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 * SPDX-License-Identifier: GPL-2.0+
14 * I2C Functions similar to the standard memory functions.
16 * There are several parameters in many of the commands that bear further
19 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
20 * Each I2C chip on the bus has a unique address. On the I2C data bus,
21 * the address is the upper seven bits and the LSB is the "read/write"
22 * bit. Note that the {i2c_chip} address specified on the command
23 * line is not shifted up: e.g. a typical EEPROM memory chip may have
24 * an I2C address of 0x50, but the data put on the bus will be 0xA0
25 * for write and 0xA1 for read. This "non shifted" address notation
26 * matches at least half of the data sheets :-/.
28 * {addr} is the address (or offset) within the chip. Small memory
29 * chips have 8 bit addresses. Large memory chips have 16 bit
30 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
31 * Many non-memory chips have multiple registers and {addr} is used
32 * as the register index. Some non-memory chips have only one register
33 * and therefore don't need any {addr} parameter.
35 * The default {addr} parameter is one byte (.1) which works well for
36 * memories and registers with 8 bits of address space.
38 * You can specify the length of the {addr} field with the optional .0,
39 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
40 * manipulating a single register device which doesn't use an address
41 * field, use "0.0" for the address and the ".0" length field will
42 * suppress the address in the I2C data stream. This also works for
43 * successive reads using the I2C auto-incrementing memory pointer.
45 * If you are manipulating a large memory with 2-byte addresses, use
46 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
48 * Then there are the unfortunate memory chips that spill the most
49 * significant 1, 2, or 3 bits of address into the chip address byte.
50 * This effectively makes one chip (logically) look like 2, 4, or
51 * 8 chips. This is handled (awkwardly) by #defining
52 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
53 * {addr} field (since .1 is the default, it doesn't actually have to
54 * be specified). Examples: given a memory chip at I2C chip address
55 * 0x50, the following would happen...
56 * i2c md 50 0 10 display 16 bytes starting at 0x000
57 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
58 * i2c md 50 100 10 display 16 bytes starting at 0x100
59 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
60 * i2c md 50 210 10 display 16 bytes starting at 0x210
61 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
62 * This is awfully ugly. It would be nice if someone would think up
63 * a better way of handling this.
65 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
69 #include <bootretry.h>
73 #include <environment.h>
76 #include <asm/byteorder.h>
77 #include <linux/compiler.h>
79 DECLARE_GLOBAL_DATA_PTR;
81 /* Display values from last command.
82 * Memory modify remembered values are different from display memory.
84 static uchar i2c_dp_last_chip;
85 static uint i2c_dp_last_addr;
86 static uint i2c_dp_last_alen;
87 static uint i2c_dp_last_length = 0x10;
89 static uchar i2c_mm_last_chip;
90 static uint i2c_mm_last_addr;
91 static uint i2c_mm_last_alen;
93 /* If only one I2C bus is present, the list of devices to ignore when
94 * the probe command is issued is represented by a 1D array of addresses.
95 * When multiple buses are present, the list is an array of bus-address
96 * pairs. The following macros take care of this */
98 #if defined(CONFIG_SYS_I2C_NOPROBES)
99 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
104 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
105 #define GET_BUS_NUM i2c_get_bus_num()
106 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
107 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
108 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
109 #else /* single bus */
110 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
111 #define GET_BUS_NUM 0
112 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
113 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
114 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
115 #endif /* defined(CONFIG_SYS_I2C) */
118 #define DISP_LINE_LEN 16
121 * i2c_init_board() - Board-specific I2C bus init
123 * This function is the default no-op implementation of I2C bus
124 * initialization. This function can be overriden by board-specific
125 * implementation if needed.
128 void i2c_init_board(void)
132 /* TODO: Implement architecture-specific get/set functions */
135 * i2c_get_bus_speed() - Return I2C bus speed
137 * This function is the default implementation of function for retrieveing
138 * the current I2C bus speed in Hz.
140 * A driver implementing runtime switching of I2C bus speed must override
141 * this function to report the speed correctly. Simple or legacy drivers
142 * can use this fallback.
144 * Returns I2C bus speed in Hz.
146 #if !defined(CONFIG_SYS_I2C)
148 * TODO: Implement architecture-specific get/set functions
149 * Should go away, if we switched completely to new multibus support
152 unsigned int i2c_get_bus_speed(void)
154 return CONFIG_SYS_I2C_SPEED;
158 * i2c_set_bus_speed() - Configure I2C bus speed
159 * @speed: Newly set speed of the I2C bus in Hz
161 * This function is the default implementation of function for setting
162 * the I2C bus speed in Hz.
164 * A driver implementing runtime switching of I2C bus speed must override
165 * this function to report the speed correctly. Simple or legacy drivers
166 * can use this fallback.
168 * Returns zero on success, negative value on error.
171 int i2c_set_bus_speed(unsigned int speed)
173 if (speed != CONFIG_SYS_I2C_SPEED)
181 * get_alen() - Small parser helper function to get address length
183 * Returns the address length.
185 static uint get_alen(char *arg)
191 for (j = 0; j < 8; j++) {
193 alen = arg[j+1] - '0';
195 } else if (arg[j] == '\0')
206 static int i2c_report_err(int ret, enum i2c_err_op op)
208 printf("Error %s the chip: %d\n",
209 op == I2C_ERR_READ ? "reading" : "writing", ret);
211 return CMD_RET_FAILURE;
215 * do_i2c_read() - Handle the "i2c read" command-line command
216 * @cmdtp: Command data struct pointer
217 * @flag: Command flag
218 * @argc: Command-line argument count
219 * @argv: Array of command-line arguments
221 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
225 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
227 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
230 uint devaddr, alen, length;
234 return CMD_RET_USAGE;
239 chip = simple_strtoul(argv[1], NULL, 16);
242 * I2C data address within the chip. This can be 1 or
243 * 2 bytes long. Some day it might be 3 bytes long :-).
245 devaddr = simple_strtoul(argv[2], NULL, 16);
246 alen = get_alen(argv[2]);
248 return CMD_RET_USAGE;
251 * Length is the number of objects, not number of bytes.
253 length = simple_strtoul(argv[3], NULL, 16);
256 * memaddr is the address where to store things in memory
258 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
260 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
261 i2c_report_err(-1, I2C_ERR_READ);
267 static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
270 uint devaddr, alen, length;
274 return cmd_usage(cmdtp);
277 * memaddr is the address where to store things in memory
279 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
284 chip = simple_strtoul(argv[2], NULL, 16);
287 * I2C data address within the chip. This can be 1 or
288 * 2 bytes long. Some day it might be 3 bytes long :-).
290 devaddr = simple_strtoul(argv[3], NULL, 16);
291 alen = get_alen(argv[3]);
293 return cmd_usage(cmdtp);
296 * Length is the number of objects, not number of bytes.
298 length = simple_strtoul(argv[4], NULL, 16);
300 while (length-- > 0) {
301 if (i2c_write(chip, devaddr++, alen, memaddr++, 1) != 0) {
302 return i2c_report_err(-1, I2C_ERR_WRITE);
305 * No write delay with FRAM devices.
307 #if !defined(CONFIG_SYS_I2C_FRAM)
315 * do_i2c_md() - Handle the "i2c md" command-line command
316 * @cmdtp: Command data struct pointer
317 * @flag: Command flag
318 * @argc: Command-line argument count
319 * @argv: Array of command-line arguments
321 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
325 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
327 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
330 uint addr, alen, length;
331 int j, nbytes, linebytes;
333 /* We use the last specified parameters, unless new ones are
336 chip = i2c_dp_last_chip;
337 addr = i2c_dp_last_addr;
338 alen = i2c_dp_last_alen;
339 length = i2c_dp_last_length;
342 return CMD_RET_USAGE;
344 if ((flag & CMD_FLAG_REPEAT) == 0) {
346 * New command specified.
352 chip = simple_strtoul(argv[1], NULL, 16);
355 * I2C data address within the chip. This can be 1 or
356 * 2 bytes long. Some day it might be 3 bytes long :-).
358 addr = simple_strtoul(argv[2], NULL, 16);
359 alen = get_alen(argv[2]);
361 return CMD_RET_USAGE;
364 * If another parameter, it is the length to display.
365 * Length is the number of objects, not number of bytes.
368 length = simple_strtoul(argv[3], NULL, 16);
374 * We buffer all read data, so we can make sure data is read only
379 unsigned char linebuf[DISP_LINE_LEN];
382 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
384 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
385 i2c_report_err(-1, I2C_ERR_READ);
387 printf("%04x:", addr);
389 for (j=0; j<linebytes; j++) {
390 printf(" %02x", *cp++);
395 for (j=0; j<linebytes; j++) {
396 if ((*cp < 0x20) || (*cp > 0x7e))
405 } while (nbytes > 0);
407 i2c_dp_last_chip = chip;
408 i2c_dp_last_addr = addr;
409 i2c_dp_last_alen = alen;
410 i2c_dp_last_length = length;
416 * do_i2c_mw() - Handle the "i2c mw" command-line command
417 * @cmdtp: Command data struct pointer
418 * @flag: Command flag
419 * @argc: Command-line argument count
420 * @argv: Array of command-line arguments
422 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
426 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
428 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
436 if ((argc < 4) || (argc > 5))
437 return CMD_RET_USAGE;
440 * Chip is always specified.
442 chip = simple_strtoul(argv[1], NULL, 16);
445 * Address is always specified.
447 addr = simple_strtoul(argv[2], NULL, 16);
448 alen = get_alen(argv[2]);
450 return CMD_RET_USAGE;
453 * Value to write is always specified.
455 byte = simple_strtoul(argv[3], NULL, 16);
461 count = simple_strtoul(argv[4], NULL, 16);
465 while (count-- > 0) {
466 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
467 i2c_report_err(-1, I2C_ERR_WRITE);
469 * Wait for the write to complete. The write can take
470 * up to 10mSec (we allow a little more time).
473 * No write delay with FRAM devices.
475 #if !defined(CONFIG_SYS_I2C_FRAM)
484 * do_i2c_crc() - Handle the "i2c crc32" command-line command
485 * @cmdtp: Command data struct pointer
486 * @flag: Command flag
487 * @argc: Command-line argument count
488 * @argv: Array of command-line arguments
490 * Calculate a CRC on memory
492 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
496 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
498 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
509 return CMD_RET_USAGE;
512 * Chip is always specified.
514 chip = simple_strtoul(argv[1], NULL, 16);
517 * Address is always specified.
519 addr = simple_strtoul(argv[2], NULL, 16);
520 alen = get_alen(argv[2]);
522 return CMD_RET_USAGE;
525 * Count is always specified
527 count = simple_strtoul(argv[3], NULL, 16);
529 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
531 * CRC a byte at a time. This is going to be slooow, but hey, the
532 * memories are small and slow too so hopefully nobody notices.
536 while (count-- > 0) {
537 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
539 crc = crc32 (crc, &byte, 1);
543 i2c_report_err(-1, I2C_ERR_READ);
545 printf ("%08lx\n", crc);
551 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
552 * @cmdtp: Command data struct pointer
553 * @flag: Command flag
554 * @argc: Command-line argument count
555 * @argv: Array of command-line arguments
559 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
563 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
564 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
567 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
577 return CMD_RET_USAGE;
579 bootretry_reset_cmd_timeout(); /* got a good command to get here */
581 * We use the last specified parameters, unless new ones are
584 chip = i2c_mm_last_chip;
585 addr = i2c_mm_last_addr;
586 alen = i2c_mm_last_alen;
588 if ((flag & CMD_FLAG_REPEAT) == 0) {
590 * New command specified. Check for a size specification.
591 * Defaults to byte if no or incorrect specification.
593 size = cmd_get_data_size(argv[0], 1);
596 * Chip is always specified.
598 chip = simple_strtoul(argv[1], NULL, 16);
601 * Address is always specified.
603 addr = simple_strtoul(argv[2], NULL, 16);
604 alen = get_alen(argv[2]);
606 return CMD_RET_USAGE;
610 * Print the address, followed by value. Then accept input for
611 * the next value. A non-converted value exits.
614 printf("%08lx:", addr);
615 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
616 i2c_report_err(-1, I2C_ERR_READ);
618 data = cpu_to_be32(data);
620 printf(" %02lx", (data >> 24) & 0x000000FF);
622 printf(" %04lx", (data >> 16) & 0x0000FFFF);
624 printf(" %08lx", data);
627 nbytes = cli_readline(" ? ");
630 * <CR> pressed as only input, don't modify current
631 * location and move to next.
636 /* good enough to not time out */
637 bootretry_reset_cmd_timeout();
639 #ifdef CONFIG_BOOT_RETRY_TIME
640 else if (nbytes == -2)
641 break; /* timed out, exit the command */
646 data = simple_strtoul(console_buffer, &endp, 16);
651 data = be32_to_cpu(data);
652 nbytes = endp - console_buffer;
655 * good enough to not time out
657 bootretry_reset_cmd_timeout();
658 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
659 i2c_report_err(-1, I2C_ERR_WRITE);
660 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
661 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
669 i2c_mm_last_chip = chip;
670 i2c_mm_last_addr = addr;
671 i2c_mm_last_alen = alen;
677 * do_i2c_probe() - Handle the "i2c probe" command-line command
678 * @cmdtp: Command data struct pointer
679 * @flag: Command flag
680 * @argc: Command-line argument count
681 * @argv: Array of command-line arguments
683 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
689 * Returns zero (success) if one or more I2C devices was found
691 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
696 #if defined(CONFIG_SYS_I2C_NOPROBES)
698 unsigned int bus = GET_BUS_NUM;
699 #endif /* NOPROBES */
702 addr = simple_strtol(argv[1], 0, 16);
704 puts ("Valid chip addresses:");
705 for (j = 0; j < 128; j++) {
706 if ((0 <= addr) && (j != addr))
709 #if defined(CONFIG_SYS_I2C_NOPROBES)
711 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
712 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
720 if (i2c_probe(j) == 0) {
727 #if defined(CONFIG_SYS_I2C_NOPROBES)
728 puts ("Excluded chip addresses:");
729 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
730 if (COMPARE_BUS(bus,k))
731 printf(" %02X", NO_PROBE_ADDR(k));
740 * do_i2c_loop() - Handle the "i2c loop" command-line command
741 * @cmdtp: Command data struct pointer
742 * @flag: Command flag
743 * @argc: Command-line argument count
744 * @argv: Array of command-line arguments
746 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
750 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
751 * {length} - Number of bytes to read
752 * {delay} - A DECIMAL number and defaults to 1000 uSec
754 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
764 return CMD_RET_USAGE;
767 * Chip is always specified.
769 chip = simple_strtoul(argv[1], NULL, 16);
772 * Address is always specified.
774 addr = simple_strtoul(argv[2], NULL, 16);
775 alen = get_alen(argv[2]);
777 return CMD_RET_USAGE;
780 * Length is the number of objects, not number of bytes.
783 length = simple_strtoul(argv[3], NULL, 16);
784 if (length > sizeof(bytes))
785 length = sizeof(bytes);
788 * The delay time (uSec) is optional.
792 delay = simple_strtoul(argv[4], NULL, 10);
797 if (i2c_read(chip, addr, alen, bytes, length) != 0)
798 i2c_report_err(-1, I2C_ERR_READ);
807 * The SDRAM command is separately configured because many
808 * (most?) embedded boards don't use SDRAM DIMMs.
810 * FIXME: Document and probably move elsewhere!
812 #if defined(CONFIG_CMD_SDRAM)
813 static void print_ddr2_tcyc (u_char const b)
815 printf ("%d.", (b >> 4) & 0x0F);
827 printf ("%d ns\n", b & 0x0F);
847 static void decode_bits (u_char const b, char const *str[], int const do_once)
851 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
862 * i2c sdram {i2c_chip}
864 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
866 enum { unknown, EDO, SDRAM, DDR2 } type;
873 static const char *decode_CAS_DDR2[] = {
874 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
877 static const char *decode_CAS_default[] = {
878 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
881 static const char *decode_CS_WE_default[] = {
882 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
885 static const char *decode_byte21_default[] = {
887 " Redundant row address\n",
888 " Differential clock input\n",
889 " Registerd DQMB inputs\n",
890 " Buffered DQMB inputs\n",
892 " Registered address/control lines\n",
893 " Buffered address/control lines\n"
896 static const char *decode_byte22_DDR2[] = {
902 " Supports partial array self refresh\n",
903 " Supports 50 ohm ODT\n",
904 " Supports weak driver\n"
907 static const char *decode_row_density_DDR2[] = {
908 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
909 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
912 static const char *decode_row_density_default[] = {
913 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
914 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
918 return CMD_RET_USAGE;
921 * Chip is always specified.
923 chip = simple_strtoul (argv[1], NULL, 16);
925 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
926 puts ("No SDRAM Serial Presence Detect found.\n");
931 for (j = 0; j < 63; j++) {
934 if (cksum != data[63]) {
935 printf ("WARNING: Configuration data checksum failure:\n"
936 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
938 printf ("SPD data revision %d.%d\n",
939 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
940 printf ("Bytes used 0x%02X\n", data[0]);
941 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
943 puts ("Memory type ");
963 puts ("Row address bits ");
964 if ((data[3] & 0x00F0) == 0)
965 printf ("%d\n", data[3] & 0x0F);
967 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
969 puts ("Column address bits ");
970 if ((data[4] & 0x00F0) == 0)
971 printf ("%d\n", data[4] & 0x0F);
973 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
977 printf ("Number of ranks %d\n",
978 (data[5] & 0x07) + 1);
981 printf ("Module rows %d\n", data[5]);
987 printf ("Module data width %d bits\n", data[6]);
990 printf ("Module data width %d bits\n",
991 (data[7] << 8) | data[6]);
995 puts ("Interface signal levels ");
997 case 0: puts ("TTL 5.0 V\n"); break;
998 case 1: puts ("LVTTL\n"); break;
999 case 2: puts ("HSTL 1.5 V\n"); break;
1000 case 3: puts ("SSTL 3.3 V\n"); break;
1001 case 4: puts ("SSTL 2.5 V\n"); break;
1002 case 5: puts ("SSTL 1.8 V\n"); break;
1003 default: puts ("unknown\n"); break;
1008 printf ("SDRAM cycle time ");
1009 print_ddr2_tcyc (data[9]);
1012 printf ("SDRAM cycle time %d.%d ns\n",
1013 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1019 printf ("SDRAM access time 0.%d%d ns\n",
1020 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1023 printf ("SDRAM access time %d.%d ns\n",
1024 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1028 puts ("EDC configuration ");
1030 case 0: puts ("None\n"); break;
1031 case 1: puts ("Parity\n"); break;
1032 case 2: puts ("ECC\n"); break;
1033 default: puts ("unknown\n"); break;
1036 if ((data[12] & 0x80) == 0)
1037 puts ("No self refresh, rate ");
1039 puts ("Self refresh, rate ");
1041 switch(data[12] & 0x7F) {
1042 case 0: puts ("15.625 us\n"); break;
1043 case 1: puts ("3.9 us\n"); break;
1044 case 2: puts ("7.8 us\n"); break;
1045 case 3: puts ("31.3 us\n"); break;
1046 case 4: puts ("62.5 us\n"); break;
1047 case 5: puts ("125 us\n"); break;
1048 default: puts ("unknown\n"); break;
1053 printf ("SDRAM width (primary) %d\n", data[13]);
1056 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1057 if ((data[13] & 0x80) != 0) {
1058 printf (" (second bank) %d\n",
1059 2 * (data[13] & 0x7F));
1067 printf ("EDC width %d\n", data[14]);
1070 if (data[14] != 0) {
1071 printf ("EDC width %d\n",
1074 if ((data[14] & 0x80) != 0) {
1075 printf (" (second bank) %d\n",
1076 2 * (data[14] & 0x7F));
1083 printf ("Min clock delay, back-to-back random column addresses "
1087 puts ("Burst length(s) ");
1088 if (data[16] & 0x80) puts (" Page");
1089 if (data[16] & 0x08) puts (" 8");
1090 if (data[16] & 0x04) puts (" 4");
1091 if (data[16] & 0x02) puts (" 2");
1092 if (data[16] & 0x01) puts (" 1");
1094 printf ("Number of banks %d\n", data[17]);
1098 puts ("CAS latency(s) ");
1099 decode_bits (data[18], decode_CAS_DDR2, 0);
1103 puts ("CAS latency(s) ");
1104 decode_bits (data[18], decode_CAS_default, 0);
1110 puts ("CS latency(s) ");
1111 decode_bits (data[19], decode_CS_WE_default, 0);
1116 puts ("WE latency(s) ");
1117 decode_bits (data[20], decode_CS_WE_default, 0);
1123 puts ("Module attributes:\n");
1124 if (data[21] & 0x80)
1125 puts (" TBD (bit 7)\n");
1126 if (data[21] & 0x40)
1127 puts (" Analysis probe installed\n");
1128 if (data[21] & 0x20)
1129 puts (" TBD (bit 5)\n");
1130 if (data[21] & 0x10)
1131 puts (" FET switch external enable\n");
1132 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1133 if (data[20] & 0x11) {
1134 printf (" %d active registers on DIMM\n",
1135 (data[21] & 0x03) + 1);
1139 puts ("Module attributes:\n");
1143 decode_bits (data[21], decode_byte21_default, 0);
1149 decode_bits (data[22], decode_byte22_DDR2, 0);
1152 puts ("Device attributes:\n");
1153 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1154 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1155 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1156 else puts (" Upper Vcc tolerance 10%\n");
1157 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1158 else puts (" Lower Vcc tolerance 10%\n");
1159 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1160 if (data[22] & 0x04) puts (" Supports precharge all\n");
1161 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1162 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1168 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1169 print_ddr2_tcyc (data[23]);
1172 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1173 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1179 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1180 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1183 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1184 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1190 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1191 print_ddr2_tcyc (data[25]);
1194 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1195 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1201 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1202 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1205 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1206 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1212 printf ("Minimum row precharge %d.%02d ns\n",
1213 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1216 printf ("Minimum row precharge %d ns\n", data[27]);
1222 printf ("Row active to row active min %d.%02d ns\n",
1223 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1226 printf ("Row active to row active min %d ns\n", data[28]);
1232 printf ("RAS to CAS delay min %d.%02d ns\n",
1233 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1236 printf ("RAS to CAS delay min %d ns\n", data[29]);
1240 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1244 puts ("Density of each row ");
1245 decode_bits (data[31], decode_row_density_DDR2, 1);
1249 puts ("Density of each row ");
1250 decode_bits (data[31], decode_row_density_default, 1);
1257 puts ("Command and Address setup ");
1258 if (data[32] >= 0xA0) {
1259 printf ("1.%d%d ns\n",
1260 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1262 printf ("0.%d%d ns\n",
1263 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1267 printf ("Command and Address setup %c%d.%d ns\n",
1268 (data[32] & 0x80) ? '-' : '+',
1269 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1275 puts ("Command and Address hold ");
1276 if (data[33] >= 0xA0) {
1277 printf ("1.%d%d ns\n",
1278 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1280 printf ("0.%d%d ns\n",
1281 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1285 printf ("Command and Address hold %c%d.%d ns\n",
1286 (data[33] & 0x80) ? '-' : '+',
1287 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1293 printf ("Data signal input setup 0.%d%d ns\n",
1294 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1297 printf ("Data signal input setup %c%d.%d ns\n",
1298 (data[34] & 0x80) ? '-' : '+',
1299 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1305 printf ("Data signal input hold 0.%d%d ns\n",
1306 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1309 printf ("Data signal input hold %c%d.%d ns\n",
1310 (data[35] & 0x80) ? '-' : '+',
1311 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1315 puts ("Manufacturer's JEDEC ID ");
1316 for (j = 64; j <= 71; j++)
1317 printf ("%02X ", data[j]);
1319 printf ("Manufacturing Location %02X\n", data[72]);
1320 puts ("Manufacturer's Part Number ");
1321 for (j = 73; j <= 90; j++)
1322 printf ("%02X ", data[j]);
1324 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1325 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1326 puts ("Assembly Serial Number ");
1327 for (j = 95; j <= 98; j++)
1328 printf ("%02X ", data[j]);
1332 printf ("Speed rating PC%d\n",
1333 data[126] == 0x66 ? 66 : data[126]);
1341 * i2c edid {i2c_chip}
1343 #if defined(CONFIG_I2C_EDID)
1344 int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
1347 struct edid1_info edid;
1354 chip = simple_strtoul(argv[1], NULL, 16);
1355 if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) {
1356 i2c_report_err(-1, I2C_ERR_READ);
1360 if (edid_check_info(&edid)) {
1361 puts("Content isn't valid EDID.\n");
1365 edid_print_info(&edid);
1369 #endif /* CONFIG_I2C_EDID */
1372 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1373 * @cmdtp: Command data struct pointer
1374 * @flag: Command flag
1375 * @argc: Command-line argument count
1376 * @argv: Array of command-line arguments
1378 * Returns zero always.
1380 #if defined(CONFIG_SYS_I2C)
1381 static int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc,
1382 char * const argv[])
1385 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1390 /* show all busses */
1391 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1392 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1393 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1394 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1395 if (i2c_bus[i].next_hop[j].chip == 0)
1397 printf("->%s@0x%2x:%d",
1398 i2c_bus[i].next_hop[j].mux.name,
1399 i2c_bus[i].next_hop[j].chip,
1400 i2c_bus[i].next_hop[j].channel);
1406 /* show specific bus */
1407 i = simple_strtoul(argv[1], NULL, 10);
1408 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1409 printf("Invalid bus %d\n", i);
1412 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1413 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1414 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1415 if (i2c_bus[i].next_hop[j].chip == 0)
1417 printf("->%s@0x%2x:%d",
1418 i2c_bus[i].next_hop[j].mux.name,
1419 i2c_bus[i].next_hop[j].chip,
1420 i2c_bus[i].next_hop[j].channel);
1431 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1432 * @cmdtp: Command data struct pointer
1433 * @flag: Command flag
1434 * @argc: Command-line argument count
1435 * @argv: Array of command-line arguments
1437 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1440 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
1441 static int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc,
1442 char * const argv[])
1445 unsigned int bus_no;
1448 /* querying current setting */
1449 printf("Current bus is %d\n", i2c_get_bus_num());
1451 bus_no = simple_strtoul(argv[1], NULL, 10);
1452 #if defined(CONFIG_SYS_I2C)
1453 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1454 printf("Invalid bus %d\n", bus_no);
1458 printf("Setting bus to %d\n", bus_no);
1459 ret = i2c_set_bus_num(bus_no);
1461 printf("Failure changing bus number (%d)\n", ret);
1465 #endif /* defined(CONFIG_SYS_I2C) */
1468 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1469 * @cmdtp: Command data struct pointer
1470 * @flag: Command flag
1471 * @argc: Command-line argument count
1472 * @argv: Array of command-line arguments
1474 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1477 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1482 /* querying current speed */
1483 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1485 speed = simple_strtoul(argv[1], NULL, 10);
1486 printf("Setting bus speed to %d Hz\n", speed);
1487 ret = i2c_set_bus_speed(speed);
1489 printf("Failure changing bus speed (%d)\n", ret);
1495 * do_i2c_mm() - Handle the "i2c mm" command-line command
1496 * @cmdtp: Command data struct pointer
1497 * @flag: Command flag
1498 * @argc: Command-line argument count
1499 * @argv: Array of command-line arguments
1501 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1504 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1506 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1510 * do_i2c_nm() - Handle the "i2c nm" command-line command
1511 * @cmdtp: Command data struct pointer
1512 * @flag: Command flag
1513 * @argc: Command-line argument count
1514 * @argv: Array of command-line arguments
1516 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1519 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1521 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1525 * do_i2c_reset() - Handle the "i2c reset" command-line command
1526 * @cmdtp: Command data struct pointer
1527 * @flag: Command flag
1528 * @argc: Command-line argument count
1529 * @argv: Array of command-line arguments
1531 * Returns zero always.
1533 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1535 #if defined(CONFIG_SYS_I2C)
1536 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1538 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1543 static cmd_tbl_t cmd_i2c_sub[] = {
1544 #if defined(CONFIG_SYS_I2C)
1545 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1547 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1548 #if defined(CONFIG_SYS_I2C) || \
1549 defined(CONFIG_I2C_MULTI_BUS)
1550 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1551 #endif /* CONFIG_I2C_MULTI_BUS */
1552 #if defined(CONFIG_I2C_EDID)
1553 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1554 #endif /* CONFIG_I2C_EDID */
1555 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1556 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1557 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1558 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1559 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1560 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1561 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1562 U_BOOT_CMD_MKENT(write, 5, 0, do_i2c_write, "", ""),
1563 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1564 #if defined(CONFIG_CMD_SDRAM)
1565 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1567 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1570 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1571 void i2c_reloc(void) {
1572 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1577 * do_i2c() - Handle the "i2c" command-line command
1578 * @cmdtp: Command data struct pointer
1579 * @flag: Command flag
1580 * @argc: Command-line argument count
1581 * @argv: Array of command-line arguments
1583 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1586 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1591 return CMD_RET_USAGE;
1593 /* Strip off leading 'i2c' command argument */
1597 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1600 return c->cmd(cmdtp, flag, argc, argv);
1602 return CMD_RET_USAGE;
1605 /***************************************************/
1606 #ifdef CONFIG_SYS_LONGHELP
1607 static char i2c_help_text[] =
1608 #if defined(CONFIG_SYS_I2C)
1609 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1611 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1612 #if defined(CONFIG_SYS_I2C) || \
1613 defined(CONFIG_I2C_MULTI_BUS)
1614 "i2c dev [dev] - show or set current I2C bus\n"
1615 #endif /* CONFIG_I2C_MULTI_BUS */
1616 #if defined(CONFIG_I2C_EDID)
1617 "i2c edid chip - print EDID configuration information\n"
1618 #endif /* CONFIG_I2C_EDID */
1619 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1620 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1621 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1622 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1623 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1624 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1625 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1626 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1627 "i2c reset - re-init the I2C Controller\n"
1628 #if defined(CONFIG_CMD_SDRAM)
1629 "i2c sdram chip - print SDRAM configuration information\n"
1631 "i2c speed [speed] - show or set I2C bus speed";