1 // SPDX-License-Identifier: GPL-2.0+
4 * Sergey Kubushyn, himself, ksi@koi8.net
6 * Changes for unified multibus/multiadapter I2C support.
9 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
13 * I2C Functions similar to the standard memory functions.
15 * There are several parameters in many of the commands that bear further
18 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
19 * Each I2C chip on the bus has a unique address. On the I2C data bus,
20 * the address is the upper seven bits and the LSB is the "read/write"
21 * bit. Note that the {i2c_chip} address specified on the command
22 * line is not shifted up: e.g. a typical EEPROM memory chip may have
23 * an I2C address of 0x50, but the data put on the bus will be 0xA0
24 * for write and 0xA1 for read. This "non shifted" address notation
25 * matches at least half of the data sheets :-/.
27 * {addr} is the address (or offset) within the chip. Small memory
28 * chips have 8 bit addresses. Large memory chips have 16 bit
29 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
30 * Many non-memory chips have multiple registers and {addr} is used
31 * as the register index. Some non-memory chips have only one register
32 * and therefore don't need any {addr} parameter.
34 * The default {addr} parameter is one byte (.1) which works well for
35 * memories and registers with 8 bits of address space.
37 * You can specify the length of the {addr} field with the optional .0,
38 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
39 * manipulating a single register device which doesn't use an address
40 * field, use "0.0" for the address and the ".0" length field will
41 * suppress the address in the I2C data stream. This also works for
42 * successive reads using the I2C auto-incrementing memory pointer.
44 * If you are manipulating a large memory with 2-byte addresses, use
45 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
47 * Then there are the unfortunate memory chips that spill the most
48 * significant 1, 2, or 3 bits of address into the chip address byte.
49 * This effectively makes one chip (logically) look like 2, 4, or
50 * 8 chips. This is handled (awkwardly) by #defining
51 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
52 * {addr} field (since .1 is the default, it doesn't actually have to
53 * be specified). Examples: given a memory chip at I2C chip address
54 * 0x50, the following would happen...
55 * i2c md 50 0 10 display 16 bytes starting at 0x000
56 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
57 * i2c md 50 100 10 display 16 bytes starting at 0x100
58 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
59 * i2c md 50 210 10 display 16 bytes starting at 0x210
60 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
61 * This is awfully ugly. It would be nice if someone would think up
62 * a better way of handling this.
64 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
68 #include <bootretry.h>
78 #include <asm/byteorder.h>
79 #include <linux/compiler.h>
80 #include <linux/delay.h>
81 #include <u-boot/crc.h>
83 /* Display values from last command.
84 * Memory modify remembered values are different from display memory.
86 static uint i2c_dp_last_chip;
87 static uint i2c_dp_last_addr;
88 static uint i2c_dp_last_alen;
89 static uint i2c_dp_last_length = 0x10;
91 static uint i2c_mm_last_chip;
92 static uint i2c_mm_last_addr;
93 static uint i2c_mm_last_alen;
95 /* If only one I2C bus is present, the list of devices to ignore when
96 * the probe command is issued is represented by a 1D array of addresses.
97 * When multiple buses are present, the list is an array of bus-address
98 * pairs. The following macros take care of this */
100 #if defined(CONFIG_SYS_I2C_NOPROBES)
101 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || defined(CONFIG_I2C_MULTI_BUS)
106 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
107 #define GET_BUS_NUM i2c_get_bus_num()
108 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
109 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
110 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
111 #else /* single bus */
112 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
113 #define GET_BUS_NUM 0
114 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
115 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
116 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
117 #endif /* CONFIG_IS_ENABLED(SYS_I2C_LEGACY) */
120 #define DISP_LINE_LEN 16
123 * Default for driver model is to use the chip's existing address length.
124 * For legacy code, this is not stored, so we need to use a suitable
127 #if CONFIG_IS_ENABLED(DM_I2C)
128 #define DEFAULT_ADDR_LEN (-1)
130 #define DEFAULT_ADDR_LEN 1
133 #if CONFIG_IS_ENABLED(DM_I2C)
134 static struct udevice *i2c_cur_bus;
136 static int cmd_i2c_set_bus_num(unsigned int busnum)
141 ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
143 debug("%s: No bus %d\n", __func__, busnum);
151 static int i2c_get_cur_bus(struct udevice **busp)
153 #ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
155 if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER)) {
156 printf("Default I2C bus %d not found\n",
157 CONFIG_I2C_DEFAULT_BUS_NUMBER);
164 puts("No I2C bus selected\n");
172 static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
177 ret = i2c_get_cur_bus(&bus);
181 return i2c_get_chip(bus, chip_addr, 1, devp);
187 * i2c_init_board() - Board-specific I2C bus init
189 * This function is the default no-op implementation of I2C bus
190 * initialization. This function can be overridden by board-specific
191 * implementation if needed.
194 void i2c_init_board(void)
199 * get_alen() - Small parser helper function to get address length
201 * Returns the address length.
203 static uint get_alen(char *arg, int default_len)
209 for (j = 0; j < 8; j++) {
211 alen = arg[j+1] - '0';
213 } else if (arg[j] == '\0')
224 static int i2c_report_err(int ret, enum i2c_err_op op)
226 printf("Error %s the chip: %d\n",
227 op == I2C_ERR_READ ? "reading" : "writing", ret);
229 return CMD_RET_FAILURE;
233 * do_i2c_read() - Handle the "i2c read" command-line command
234 * @cmdtp: Command data struct pointer
235 * @flag: Command flag
236 * @argc: Command-line argument count
237 * @argv: Array of command-line arguments
239 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
243 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
245 static int do_i2c_read(struct cmd_tbl *cmdtp, int flag, int argc,
249 uint devaddr, length;
253 #if CONFIG_IS_ENABLED(DM_I2C)
258 return CMD_RET_USAGE;
263 chip = hextoul(argv[1], NULL);
266 * I2C data address within the chip. This can be 1 or
267 * 2 bytes long. Some day it might be 3 bytes long :-).
269 devaddr = hextoul(argv[2], NULL);
270 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
272 return CMD_RET_USAGE;
275 * Length is the number of objects, not number of bytes.
277 length = hextoul(argv[3], NULL);
280 * memaddr is the address where to store things in memory
282 memaddr = (u_char *)hextoul(argv[4], NULL);
284 #if CONFIG_IS_ENABLED(DM_I2C)
285 ret = i2c_get_cur_bus_chip(chip, &dev);
286 if (!ret && alen != -1)
287 ret = i2c_set_chip_offset_len(dev, alen);
289 ret = dm_i2c_read(dev, devaddr, memaddr, length);
291 ret = i2c_read(chip, devaddr, alen, memaddr, length);
294 return i2c_report_err(ret, I2C_ERR_READ);
299 static int do_i2c_write(struct cmd_tbl *cmdtp, int flag, int argc,
303 uint devaddr, length;
307 #if CONFIG_IS_ENABLED(DM_I2C)
309 struct dm_i2c_chip *i2c_chip;
312 if ((argc < 5) || (argc > 6))
313 return cmd_usage(cmdtp);
316 * memaddr is the address where to store things in memory
318 memaddr = (u_char *)hextoul(argv[1], NULL);
323 chip = hextoul(argv[2], NULL);
326 * I2C data address within the chip. This can be 1 or
327 * 2 bytes long. Some day it might be 3 bytes long :-).
329 devaddr = hextoul(argv[3], NULL);
330 alen = get_alen(argv[3], DEFAULT_ADDR_LEN);
332 return cmd_usage(cmdtp);
335 * Length is the number of bytes.
337 length = hextoul(argv[4], NULL);
339 #if CONFIG_IS_ENABLED(DM_I2C)
340 ret = i2c_get_cur_bus_chip(chip, &dev);
341 if (!ret && alen != -1)
342 ret = i2c_set_chip_offset_len(dev, alen);
344 return i2c_report_err(ret, I2C_ERR_WRITE);
345 i2c_chip = dev_get_parent_plat(dev);
347 return i2c_report_err(ret, I2C_ERR_WRITE);
350 if (argc == 6 && !strcmp(argv[5], "-s")) {
352 * Write all bytes in a single I2C transaction. If the target
353 * device is an EEPROM, it is your responsibility to not cross
354 * a page boundary. No write delay upon completion, take this
355 * into account if linking commands.
357 #if CONFIG_IS_ENABLED(DM_I2C)
358 i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
359 ret = dm_i2c_write(dev, devaddr, memaddr, length);
361 ret = i2c_write(chip, devaddr, alen, memaddr, length);
364 return i2c_report_err(ret, I2C_ERR_WRITE);
367 * Repeated addressing - perform <length> separate
368 * write transactions of one byte each
370 while (length-- > 0) {
371 #if CONFIG_IS_ENABLED(DM_I2C)
372 i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS;
373 ret = dm_i2c_write(dev, devaddr++, memaddr++, 1);
375 ret = i2c_write(chip, devaddr++, alen, memaddr++, 1);
378 return i2c_report_err(ret, I2C_ERR_WRITE);
380 * No write delay with FRAM devices.
382 #if !defined(CONFIG_SYS_I2C_FRAM)
390 #if CONFIG_IS_ENABLED(DM_I2C)
391 static int do_i2c_flags(struct cmd_tbl *cmdtp, int flag, int argc,
400 return CMD_RET_USAGE;
402 chip = hextoul(argv[1], NULL);
403 ret = i2c_get_cur_bus_chip(chip, &dev);
405 return i2c_report_err(ret, I2C_ERR_READ);
408 flags = hextoul(argv[2], NULL);
409 ret = i2c_set_chip_flags(dev, flags);
411 ret = i2c_get_chip_flags(dev, &flags);
413 printf("%x\n", flags);
416 return i2c_report_err(ret, I2C_ERR_READ);
421 static int do_i2c_olen(struct cmd_tbl *cmdtp, int flag, int argc,
430 return CMD_RET_USAGE;
432 chip = hextoul(argv[1], NULL);
433 ret = i2c_get_cur_bus_chip(chip, &dev);
435 return i2c_report_err(ret, I2C_ERR_READ);
438 olen = hextoul(argv[2], NULL);
439 ret = i2c_set_chip_offset_len(dev, olen);
441 ret = i2c_get_chip_offset_len(dev);
448 return i2c_report_err(ret, I2C_ERR_READ);
455 * do_i2c_md() - Handle the "i2c md" command-line command
456 * @cmdtp: Command data struct pointer
457 * @flag: Command flag
458 * @argc: Command-line argument count
459 * @argv: Array of command-line arguments
461 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
465 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
467 static int do_i2c_md(struct cmd_tbl *cmdtp, int flag, int argc,
474 uint nbytes, linebytes;
476 #if CONFIG_IS_ENABLED(DM_I2C)
480 /* We use the last specified parameters, unless new ones are
483 chip = i2c_dp_last_chip;
484 addr = i2c_dp_last_addr;
485 alen = i2c_dp_last_alen;
486 length = i2c_dp_last_length;
489 return CMD_RET_USAGE;
491 if ((flag & CMD_FLAG_REPEAT) == 0) {
493 * New command specified.
499 chip = hextoul(argv[1], NULL);
502 * I2C data address within the chip. This can be 1 or
503 * 2 bytes long. Some day it might be 3 bytes long :-).
505 addr = hextoul(argv[2], NULL);
506 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
508 return CMD_RET_USAGE;
511 * If another parameter, it is the length to display.
512 * Length is the number of objects, not number of bytes.
515 length = hextoul(argv[3], NULL);
518 #if CONFIG_IS_ENABLED(DM_I2C)
519 ret = i2c_get_cur_bus_chip(chip, &dev);
520 if (!ret && alen != -1)
521 ret = i2c_set_chip_offset_len(dev, alen);
523 return i2c_report_err(ret, I2C_ERR_READ);
529 * We buffer all read data, so we can make sure data is read only
534 unsigned char linebuf[DISP_LINE_LEN];
537 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
539 #if CONFIG_IS_ENABLED(DM_I2C)
540 ret = dm_i2c_read(dev, addr, linebuf, linebytes);
542 ret = i2c_read(chip, addr, alen, linebuf, linebytes);
545 return i2c_report_err(ret, I2C_ERR_READ);
547 printf("%04x:", addr);
549 for (j=0; j<linebytes; j++) {
550 printf(" %02x", *cp++);
555 for (j=0; j<linebytes; j++) {
556 if ((*cp < 0x20) || (*cp > 0x7e))
565 } while (nbytes > 0);
567 i2c_dp_last_chip = chip;
568 i2c_dp_last_addr = addr;
569 i2c_dp_last_alen = alen;
570 i2c_dp_last_length = length;
576 * do_i2c_mw() - Handle the "i2c mw" command-line command
577 * @cmdtp: Command data struct pointer
578 * @flag: Command flag
579 * @argc: Command-line argument count
580 * @argv: Array of command-line arguments
582 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
586 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
588 static int do_i2c_mw(struct cmd_tbl *cmdtp, int flag, int argc,
597 #if CONFIG_IS_ENABLED(DM_I2C)
601 if ((argc < 4) || (argc > 5))
602 return CMD_RET_USAGE;
605 * Chip is always specified.
607 chip = hextoul(argv[1], NULL);
610 * Address is always specified.
612 addr = hextoul(argv[2], NULL);
613 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
615 return CMD_RET_USAGE;
617 #if CONFIG_IS_ENABLED(DM_I2C)
618 ret = i2c_get_cur_bus_chip(chip, &dev);
619 if (!ret && alen != -1)
620 ret = i2c_set_chip_offset_len(dev, alen);
622 return i2c_report_err(ret, I2C_ERR_WRITE);
625 * Value to write is always specified.
627 byte = hextoul(argv[3], NULL);
633 count = hextoul(argv[4], NULL);
637 while (count-- > 0) {
638 #if CONFIG_IS_ENABLED(DM_I2C)
639 ret = dm_i2c_write(dev, addr++, &byte, 1);
641 ret = i2c_write(chip, addr++, alen, &byte, 1);
644 return i2c_report_err(ret, I2C_ERR_WRITE);
646 * Wait for the write to complete. The write can take
647 * up to 10mSec (we allow a little more time).
650 * No write delay with FRAM devices.
652 #if !defined(CONFIG_SYS_I2C_FRAM)
661 * do_i2c_crc() - Handle the "i2c crc32" command-line command
662 * @cmdtp: Command data struct pointer
663 * @flag: Command flag
664 * @argc: Command-line argument count
665 * @argv: Array of command-line arguments
667 * Calculate a CRC on memory
669 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
673 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
675 static int do_i2c_crc(struct cmd_tbl *cmdtp, int flag, int argc,
686 #if CONFIG_IS_ENABLED(DM_I2C)
691 return CMD_RET_USAGE;
694 * Chip is always specified.
696 chip = hextoul(argv[1], NULL);
699 * Address is always specified.
701 addr = hextoul(argv[2], NULL);
702 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
704 return CMD_RET_USAGE;
706 #if CONFIG_IS_ENABLED(DM_I2C)
707 ret = i2c_get_cur_bus_chip(chip, &dev);
708 if (!ret && alen != -1)
709 ret = i2c_set_chip_offset_len(dev, alen);
711 return i2c_report_err(ret, I2C_ERR_READ);
714 * Count is always specified
716 count = hextoul(argv[3], NULL);
718 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
720 * CRC a byte at a time. This is going to be slooow, but hey, the
721 * memories are small and slow too so hopefully nobody notices.
725 while (count-- > 0) {
726 #if CONFIG_IS_ENABLED(DM_I2C)
727 ret = dm_i2c_read(dev, addr, &byte, 1);
729 ret = i2c_read(chip, addr, alen, &byte, 1);
733 crc = crc32(crc, &byte, 1);
737 i2c_report_err(ret, I2C_ERR_READ);
739 printf ("%08lx\n", crc);
745 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
746 * @cmdtp: Command data struct pointer
747 * @flag: Command flag
748 * @argc: Command-line argument count
749 * @argv: Array of command-line arguments
753 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
757 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
758 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
760 static int mod_i2c_mem(struct cmd_tbl *cmdtp, int incrflag, int flag, int argc,
770 #if CONFIG_IS_ENABLED(DM_I2C)
775 return CMD_RET_USAGE;
777 bootretry_reset_cmd_timeout(); /* got a good command to get here */
779 * We use the last specified parameters, unless new ones are
782 chip = i2c_mm_last_chip;
783 addr = i2c_mm_last_addr;
784 alen = i2c_mm_last_alen;
786 if ((flag & CMD_FLAG_REPEAT) == 0) {
788 * New command specified. Check for a size specification.
789 * Defaults to byte if no or incorrect specification.
791 size = cmd_get_data_size(argv[0], 1);
794 * Chip is always specified.
796 chip = hextoul(argv[1], NULL);
799 * Address is always specified.
801 addr = hextoul(argv[2], NULL);
802 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
804 return CMD_RET_USAGE;
807 #if CONFIG_IS_ENABLED(DM_I2C)
808 ret = i2c_get_cur_bus_chip(chip, &dev);
809 if (!ret && alen != -1)
810 ret = i2c_set_chip_offset_len(dev, alen);
812 return i2c_report_err(ret, I2C_ERR_WRITE);
816 * Print the address, followed by value. Then accept input for
817 * the next value. A non-converted value exits.
820 printf("%08lx:", addr);
821 #if CONFIG_IS_ENABLED(DM_I2C)
822 ret = dm_i2c_read(dev, addr, (uchar *)&data, size);
824 ret = i2c_read(chip, addr, alen, (uchar *)&data, size);
827 return i2c_report_err(ret, I2C_ERR_READ);
829 data = cpu_to_be32(data);
831 printf(" %02lx", (data >> 24) & 0x000000FF);
833 printf(" %04lx", (data >> 16) & 0x0000FFFF);
835 printf(" %08lx", data);
837 nbytes = cli_readline(" ? ");
840 * <CR> pressed as only input, don't modify current
841 * location and move to next.
846 /* good enough to not time out */
847 bootretry_reset_cmd_timeout();
849 #ifdef CONFIG_BOOT_RETRY_TIME
850 else if (nbytes == -2)
851 break; /* timed out, exit the command */
856 data = hextoul(console_buffer, &endp);
861 data = be32_to_cpu(data);
862 nbytes = endp - console_buffer;
865 * good enough to not time out
867 bootretry_reset_cmd_timeout();
868 #if CONFIG_IS_ENABLED(DM_I2C)
869 ret = dm_i2c_write(dev, addr, (uchar *)&data,
872 ret = i2c_write(chip, addr, alen,
873 (uchar *)&data, size);
876 return i2c_report_err(ret,
878 #if CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS > 0
879 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
887 i2c_mm_last_chip = chip;
888 i2c_mm_last_addr = addr;
889 i2c_mm_last_alen = alen;
895 * do_i2c_probe() - Handle the "i2c probe" command-line command
896 * @cmdtp: Command data struct pointer
897 * @flag: Command flag
898 * @argc: Command-line argument count
899 * @argv: Array of command-line arguments
901 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
907 * Returns zero (success) if one or more I2C devices was found
909 static int do_i2c_probe(struct cmd_tbl *cmdtp, int flag, int argc,
915 #if defined(CONFIG_SYS_I2C_NOPROBES)
917 unsigned int bus = GET_BUS_NUM;
918 #endif /* NOPROBES */
920 #if CONFIG_IS_ENABLED(DM_I2C)
921 struct udevice *bus, *dev;
923 if (i2c_get_cur_bus(&bus))
924 return CMD_RET_FAILURE;
928 addr = simple_strtol(argv[1], 0, 16);
930 puts ("Valid chip addresses:");
931 for (j = 0; j < 128; j++) {
932 if ((0 <= addr) && (j != addr))
935 #if defined(CONFIG_SYS_I2C_NOPROBES)
937 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
938 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
946 #if CONFIG_IS_ENABLED(DM_I2C)
947 ret = dm_i2c_probe(bus, j, 0, &dev);
958 #if defined(CONFIG_SYS_I2C_NOPROBES)
959 puts ("Excluded chip addresses:");
960 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
961 if (COMPARE_BUS(bus,k))
962 printf(" %02X", NO_PROBE_ADDR(k));
971 * do_i2c_loop() - Handle the "i2c loop" command-line command
972 * @cmdtp: Command data struct pointer
973 * @flag: Command flag
974 * @argc: Command-line argument count
975 * @argv: Array of command-line arguments
977 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
981 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
982 * {length} - Number of bytes to read
983 * {delay} - A DECIMAL number and defaults to 1000 uSec
985 static int do_i2c_loop(struct cmd_tbl *cmdtp, int flag, int argc,
995 #if CONFIG_IS_ENABLED(DM_I2C)
1000 return CMD_RET_USAGE;
1003 * Chip is always specified.
1005 chip = hextoul(argv[1], NULL);
1008 * Address is always specified.
1010 addr = hextoul(argv[2], NULL);
1011 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
1013 return CMD_RET_USAGE;
1014 #if CONFIG_IS_ENABLED(DM_I2C)
1015 ret = i2c_get_cur_bus_chip(chip, &dev);
1016 if (!ret && alen != -1)
1017 ret = i2c_set_chip_offset_len(dev, alen);
1019 return i2c_report_err(ret, I2C_ERR_WRITE);
1023 * Length is the number of objects, not number of bytes.
1026 length = hextoul(argv[3], NULL);
1027 if (length > sizeof(bytes))
1028 length = sizeof(bytes);
1031 * The delay time (uSec) is optional.
1035 delay = dectoul(argv[4], NULL);
1040 #if CONFIG_IS_ENABLED(DM_I2C)
1041 ret = dm_i2c_read(dev, addr, bytes, length);
1043 ret = i2c_read(chip, addr, alen, bytes, length);
1046 i2c_report_err(ret, I2C_ERR_READ);
1055 * The SDRAM command is separately configured because many
1056 * (most?) embedded boards don't use SDRAM DIMMs.
1058 * FIXME: Document and probably move elsewhere!
1060 #if defined(CONFIG_CMD_SDRAM)
1061 static void print_ddr2_tcyc (u_char const b)
1063 printf ("%d.", (b >> 4) & 0x0F);
1075 printf ("%d ns\n", b & 0x0F);
1095 static void decode_bits (u_char const b, char const *str[], int const do_once)
1099 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
1110 * i2c sdram {i2c_chip}
1112 static int do_sdram(struct cmd_tbl *cmdtp, int flag, int argc,
1115 enum { unknown, EDO, SDRAM, DDR, DDR2, DDR3, DDR4 } type;
1121 #if CONFIG_IS_ENABLED(DM_I2C)
1122 struct udevice *dev;
1125 static const char *decode_CAS_DDR2[] = {
1126 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1129 static const char *decode_CAS_default[] = {
1130 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1133 static const char *decode_CS_WE_default[] = {
1134 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1137 static const char *decode_byte21_default[] = {
1139 " Redundant row address\n",
1140 " Differential clock input\n",
1141 " Registerd DQMB inputs\n",
1142 " Buffered DQMB inputs\n",
1144 " Registered address/control lines\n",
1145 " Buffered address/control lines\n"
1148 static const char *decode_byte22_DDR2[] = {
1154 " Supports partial array self refresh\n",
1155 " Supports 50 ohm ODT\n",
1156 " Supports weak driver\n"
1159 static const char *decode_row_density_DDR2[] = {
1160 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1161 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1164 static const char *decode_row_density_default[] = {
1165 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1166 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1170 return CMD_RET_USAGE;
1173 * Chip is always specified.
1175 chip = hextoul(argv[1], NULL);
1177 #if CONFIG_IS_ENABLED(DM_I2C)
1178 ret = i2c_get_cur_bus_chip(chip, &dev);
1180 ret = dm_i2c_read(dev, 0, data, sizeof(data));
1182 ret = i2c_read(chip, 0, 1, data, sizeof(data));
1185 puts ("No SDRAM Serial Presence Detect found.\n");
1190 for (j = 0; j < 63; j++) {
1193 if (cksum != data[63]) {
1194 printf ("WARNING: Configuration data checksum failure:\n"
1195 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
1197 printf ("SPD data revision %d.%d\n",
1198 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
1199 printf ("Bytes used 0x%02X\n", data[0]);
1200 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
1202 puts ("Memory type ");
1234 puts ("Row address bits ");
1235 if ((data[3] & 0x00F0) == 0)
1236 printf ("%d\n", data[3] & 0x0F);
1238 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
1240 puts ("Column address bits ");
1241 if ((data[4] & 0x00F0) == 0)
1242 printf ("%d\n", data[4] & 0x0F);
1244 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
1248 printf ("Number of ranks %d\n",
1249 (data[5] & 0x07) + 1);
1252 printf ("Module rows %d\n", data[5]);
1258 printf ("Module data width %d bits\n", data[6]);
1261 printf ("Module data width %d bits\n",
1262 (data[7] << 8) | data[6]);
1266 puts ("Interface signal levels ");
1268 case 0: puts ("TTL 5.0 V\n"); break;
1269 case 1: puts ("LVTTL\n"); break;
1270 case 2: puts ("HSTL 1.5 V\n"); break;
1271 case 3: puts ("SSTL 3.3 V\n"); break;
1272 case 4: puts ("SSTL 2.5 V\n"); break;
1273 case 5: puts ("SSTL 1.8 V\n"); break;
1274 default: puts ("unknown\n"); break;
1279 printf ("SDRAM cycle time ");
1280 print_ddr2_tcyc (data[9]);
1283 printf ("SDRAM cycle time %d.%d ns\n",
1284 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1290 printf ("SDRAM access time 0.%d%d ns\n",
1291 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1294 printf ("SDRAM access time %d.%d ns\n",
1295 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1299 puts ("EDC configuration ");
1301 case 0: puts ("None\n"); break;
1302 case 1: puts ("Parity\n"); break;
1303 case 2: puts ("ECC\n"); break;
1304 default: puts ("unknown\n"); break;
1307 if ((data[12] & 0x80) == 0)
1308 puts ("No self refresh, rate ");
1310 puts ("Self refresh, rate ");
1312 switch(data[12] & 0x7F) {
1313 case 0: puts ("15.625 us\n"); break;
1314 case 1: puts ("3.9 us\n"); break;
1315 case 2: puts ("7.8 us\n"); break;
1316 case 3: puts ("31.3 us\n"); break;
1317 case 4: puts ("62.5 us\n"); break;
1318 case 5: puts ("125 us\n"); break;
1319 default: puts ("unknown\n"); break;
1324 printf ("SDRAM width (primary) %d\n", data[13]);
1327 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1328 if ((data[13] & 0x80) != 0) {
1329 printf (" (second bank) %d\n",
1330 2 * (data[13] & 0x7F));
1338 printf ("EDC width %d\n", data[14]);
1341 if (data[14] != 0) {
1342 printf ("EDC width %d\n",
1345 if ((data[14] & 0x80) != 0) {
1346 printf (" (second bank) %d\n",
1347 2 * (data[14] & 0x7F));
1354 printf ("Min clock delay, back-to-back random column addresses "
1358 puts ("Burst length(s) ");
1359 if (data[16] & 0x80) puts (" Page");
1360 if (data[16] & 0x08) puts (" 8");
1361 if (data[16] & 0x04) puts (" 4");
1362 if (data[16] & 0x02) puts (" 2");
1363 if (data[16] & 0x01) puts (" 1");
1365 printf ("Number of banks %d\n", data[17]);
1369 puts ("CAS latency(s) ");
1370 decode_bits (data[18], decode_CAS_DDR2, 0);
1374 puts ("CAS latency(s) ");
1375 decode_bits (data[18], decode_CAS_default, 0);
1381 puts ("CS latency(s) ");
1382 decode_bits (data[19], decode_CS_WE_default, 0);
1387 puts ("WE latency(s) ");
1388 decode_bits (data[20], decode_CS_WE_default, 0);
1394 puts ("Module attributes:\n");
1395 if (data[21] & 0x80)
1396 puts (" TBD (bit 7)\n");
1397 if (data[21] & 0x40)
1398 puts (" Analysis probe installed\n");
1399 if (data[21] & 0x20)
1400 puts (" TBD (bit 5)\n");
1401 if (data[21] & 0x10)
1402 puts (" FET switch external enable\n");
1403 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1404 if (data[20] & 0x11) {
1405 printf (" %d active registers on DIMM\n",
1406 (data[21] & 0x03) + 1);
1410 puts ("Module attributes:\n");
1414 decode_bits (data[21], decode_byte21_default, 0);
1420 decode_bits (data[22], decode_byte22_DDR2, 0);
1423 puts ("Device attributes:\n");
1424 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1425 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1426 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1427 else puts (" Upper Vcc tolerance 10%\n");
1428 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1429 else puts (" Lower Vcc tolerance 10%\n");
1430 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1431 if (data[22] & 0x04) puts (" Supports precharge all\n");
1432 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1433 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1439 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1440 print_ddr2_tcyc (data[23]);
1443 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1444 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1450 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1451 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1454 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1455 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1461 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1462 print_ddr2_tcyc (data[25]);
1465 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1466 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1472 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1473 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1476 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1477 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1483 printf ("Minimum row precharge %d.%02d ns\n",
1484 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1487 printf ("Minimum row precharge %d ns\n", data[27]);
1493 printf ("Row active to row active min %d.%02d ns\n",
1494 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1497 printf ("Row active to row active min %d ns\n", data[28]);
1503 printf ("RAS to CAS delay min %d.%02d ns\n",
1504 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1507 printf ("RAS to CAS delay min %d ns\n", data[29]);
1511 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1515 puts ("Density of each row ");
1516 decode_bits (data[31], decode_row_density_DDR2, 1);
1520 puts ("Density of each row ");
1521 decode_bits (data[31], decode_row_density_default, 1);
1528 puts ("Command and Address setup ");
1529 if (data[32] >= 0xA0) {
1530 printf ("1.%d%d ns\n",
1531 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1533 printf ("0.%d%d ns\n",
1534 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1538 printf ("Command and Address setup %c%d.%d ns\n",
1539 (data[32] & 0x80) ? '-' : '+',
1540 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1546 puts ("Command and Address hold ");
1547 if (data[33] >= 0xA0) {
1548 printf ("1.%d%d ns\n",
1549 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1551 printf ("0.%d%d ns\n",
1552 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1556 printf ("Command and Address hold %c%d.%d ns\n",
1557 (data[33] & 0x80) ? '-' : '+',
1558 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1564 printf ("Data signal input setup 0.%d%d ns\n",
1565 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1568 printf ("Data signal input setup %c%d.%d ns\n",
1569 (data[34] & 0x80) ? '-' : '+',
1570 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1576 printf ("Data signal input hold 0.%d%d ns\n",
1577 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1580 printf ("Data signal input hold %c%d.%d ns\n",
1581 (data[35] & 0x80) ? '-' : '+',
1582 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1586 puts ("Manufacturer's JEDEC ID ");
1587 for (j = 64; j <= 71; j++)
1588 printf ("%02X ", data[j]);
1590 printf ("Manufacturing Location %02X\n", data[72]);
1591 puts ("Manufacturer's Part Number ");
1592 for (j = 73; j <= 90; j++)
1593 printf ("%02X ", data[j]);
1595 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1596 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1597 puts ("Assembly Serial Number ");
1598 for (j = 95; j <= 98; j++)
1599 printf ("%02X ", data[j]);
1603 printf ("Speed rating PC%d\n",
1604 data[126] == 0x66 ? 66 : data[126]);
1612 * i2c edid {i2c_chip}
1614 #if defined(CONFIG_I2C_EDID)
1615 int do_edid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
1618 struct edid1_info edid;
1620 #if CONFIG_IS_ENABLED(DM_I2C)
1621 struct udevice *dev;
1629 chip = hextoul(argv[1], NULL);
1630 #if CONFIG_IS_ENABLED(DM_I2C)
1631 ret = i2c_get_cur_bus_chip(chip, &dev);
1633 ret = dm_i2c_read(dev, 0, (uchar *)&edid, sizeof(edid));
1635 ret = i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid));
1638 return i2c_report_err(ret, I2C_ERR_READ);
1640 if (edid_check_info(&edid)) {
1641 puts("Content isn't valid EDID.\n");
1645 edid_print_info(&edid);
1649 #endif /* CONFIG_I2C_EDID */
1651 #if CONFIG_IS_ENABLED(DM_I2C)
1652 static void show_bus(struct udevice *bus)
1654 struct udevice *dev;
1656 printf("Bus %d:\t%s", dev_seq(bus), bus->name);
1657 if (device_active(bus))
1658 printf(" (active %d)", dev_seq(bus));
1660 for (device_find_first_child(bus, &dev);
1662 device_find_next_child(&dev)) {
1663 struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
1665 printf(" %02x: %s, offset len %x, flags %x\n",
1666 chip->chip_addr, dev->name, chip->offset_len,
1673 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1674 * @cmdtp: Command data struct pointer
1675 * @flag: Command flag
1676 * @argc: Command-line argument count
1677 * @argv: Array of command-line arguments
1679 * Returns zero always.
1681 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || CONFIG_IS_ENABLED(DM_I2C)
1682 static int do_i2c_show_bus(struct cmd_tbl *cmdtp, int flag, int argc,
1686 /* show all busses */
1687 #if CONFIG_IS_ENABLED(DM_I2C)
1688 struct udevice *bus;
1692 ret = uclass_get(UCLASS_I2C, &uc);
1694 return CMD_RET_FAILURE;
1695 uclass_foreach_dev(bus, uc)
1700 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1701 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1702 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1705 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1706 if (i2c_bus[i].next_hop[j].chip == 0)
1708 printf("->%s@0x%2x:%d",
1709 i2c_bus[i].next_hop[j].mux.name,
1710 i2c_bus[i].next_hop[j].chip,
1711 i2c_bus[i].next_hop[j].channel);
1720 /* show specific bus */
1721 i = dectoul(argv[1], NULL);
1722 #if CONFIG_IS_ENABLED(DM_I2C)
1723 struct udevice *bus;
1726 ret = uclass_get_device_by_seq(UCLASS_I2C, i, &bus);
1728 printf("Invalid bus %d: err=%d\n", i, ret);
1729 return CMD_RET_FAILURE;
1733 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1734 printf("Invalid bus %d\n", i);
1737 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1738 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1740 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1741 if (i2c_bus[i].next_hop[j].chip == 0)
1743 printf("->%s@0x%2x:%d",
1744 i2c_bus[i].next_hop[j].mux.name,
1745 i2c_bus[i].next_hop[j].chip,
1746 i2c_bus[i].next_hop[j].channel);
1758 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1759 * @cmdtp: Command data struct pointer
1760 * @flag: Command flag
1761 * @argc: Command-line argument count
1762 * @argv: Array of command-line arguments
1764 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1767 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || defined(CONFIG_I2C_MULTI_BUS) || \
1768 CONFIG_IS_ENABLED(DM_I2C)
1769 static int do_i2c_bus_num(struct cmd_tbl *cmdtp, int flag, int argc,
1776 /* querying current setting */
1777 #if CONFIG_IS_ENABLED(DM_I2C)
1778 struct udevice *bus;
1780 if (!i2c_get_cur_bus(&bus))
1781 bus_no = dev_seq(bus);
1785 bus_no = i2c_get_bus_num();
1787 printf("Current bus is %d\n", bus_no);
1789 bus_no = dectoul(argv[1], NULL);
1790 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
1791 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1792 printf("Invalid bus %d\n", bus_no);
1796 printf("Setting bus to %d\n", bus_no);
1797 #if CONFIG_IS_ENABLED(DM_I2C)
1798 ret = cmd_i2c_set_bus_num(bus_no);
1800 ret = i2c_set_bus_num(bus_no);
1803 printf("Failure changing bus number (%d)\n", ret);
1806 return ret ? CMD_RET_FAILURE : 0;
1808 #endif /* CONFIG_IS_ENABLED(SYS_I2C_LEGACY) */
1811 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1812 * @cmdtp: Command data struct pointer
1813 * @flag: Command flag
1814 * @argc: Command-line argument count
1815 * @argv: Array of command-line arguments
1817 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1820 static int do_i2c_bus_speed(struct cmd_tbl *cmdtp, int flag, int argc,
1825 #if CONFIG_IS_ENABLED(DM_I2C)
1826 struct udevice *bus;
1828 if (i2c_get_cur_bus(&bus))
1832 #if CONFIG_IS_ENABLED(DM_I2C)
1833 speed = dm_i2c_get_bus_speed(bus);
1835 speed = i2c_get_bus_speed();
1837 /* querying current speed */
1838 printf("Current bus speed=%d\n", speed);
1840 speed = dectoul(argv[1], NULL);
1841 printf("Setting bus speed to %d Hz\n", speed);
1842 #if CONFIG_IS_ENABLED(DM_I2C)
1843 ret = dm_i2c_set_bus_speed(bus, speed);
1845 ret = i2c_set_bus_speed(speed);
1848 printf("Failure changing bus speed (%d)\n", ret);
1851 return ret ? CMD_RET_FAILURE : 0;
1855 * do_i2c_mm() - Handle the "i2c mm" command-line command
1856 * @cmdtp: Command data struct pointer
1857 * @flag: Command flag
1858 * @argc: Command-line argument count
1859 * @argv: Array of command-line arguments
1861 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1864 static int do_i2c_mm(struct cmd_tbl *cmdtp, int flag, int argc,
1867 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1871 * do_i2c_nm() - Handle the "i2c nm" command-line command
1872 * @cmdtp: Command data struct pointer
1873 * @flag: Command flag
1874 * @argc: Command-line argument count
1875 * @argv: Array of command-line arguments
1877 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1880 static int do_i2c_nm(struct cmd_tbl *cmdtp, int flag, int argc,
1883 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1887 * do_i2c_reset() - Handle the "i2c reset" command-line command
1888 * @cmdtp: Command data struct pointer
1889 * @flag: Command flag
1890 * @argc: Command-line argument count
1891 * @argv: Array of command-line arguments
1893 * Returns zero always.
1895 static int do_i2c_reset(struct cmd_tbl *cmdtp, int flag, int argc,
1898 #if CONFIG_IS_ENABLED(DM_I2C)
1899 struct udevice *bus;
1901 if (i2c_get_cur_bus(&bus))
1902 return CMD_RET_FAILURE;
1903 if (i2c_deblock(bus)) {
1904 printf("Error: Not supported by the driver\n");
1905 return CMD_RET_FAILURE;
1907 #elif CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
1908 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1913 static struct cmd_tbl cmd_i2c_sub[] = {
1914 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || CONFIG_IS_ENABLED(DM_I2C)
1915 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1917 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1918 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || \
1919 defined(CONFIG_I2C_MULTI_BUS) || CONFIG_IS_ENABLED(DM_I2C)
1920 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1921 #endif /* CONFIG_I2C_MULTI_BUS */
1922 #if defined(CONFIG_I2C_EDID)
1923 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1924 #endif /* CONFIG_I2C_EDID */
1925 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1926 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1927 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1928 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1929 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1930 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1931 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1932 U_BOOT_CMD_MKENT(write, 6, 0, do_i2c_write, "", ""),
1933 #if CONFIG_IS_ENABLED(DM_I2C)
1934 U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""),
1935 U_BOOT_CMD_MKENT(olen, 2, 1, do_i2c_olen, "", ""),
1937 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1938 #if defined(CONFIG_CMD_SDRAM)
1939 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1941 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1944 static __maybe_unused void i2c_reloc(void)
1946 static int relocated;
1949 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1955 * do_i2c() - Handle the "i2c" command-line command
1956 * @cmdtp: Command data struct pointer
1957 * @flag: Command flag
1958 * @argc: Command-line argument count
1959 * @argv: Array of command-line arguments
1961 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1964 static int do_i2c(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
1968 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1973 return CMD_RET_USAGE;
1975 /* Strip off leading 'i2c' command argument */
1979 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1982 return c->cmd(cmdtp, flag, argc, argv);
1984 return CMD_RET_USAGE;
1987 /***************************************************/
1988 #ifdef CONFIG_SYS_LONGHELP
1989 static char i2c_help_text[] =
1990 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || CONFIG_IS_ENABLED(DM_I2C)
1991 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1992 "i2c " /* That's the prefix for the crc32 command below. */
1994 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1995 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) || \
1996 defined(CONFIG_I2C_MULTI_BUS) || CONFIG_IS_ENABLED(DM_I2C)
1997 "i2c dev [dev] - show or set current I2C bus\n"
1998 #endif /* CONFIG_I2C_MULTI_BUS */
1999 #if defined(CONFIG_I2C_EDID)
2000 "i2c edid chip - print EDID configuration information\n"
2001 #endif /* CONFIG_I2C_EDID */
2002 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2003 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2004 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2005 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2006 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2007 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2008 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2009 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2010 " to I2C; the -s option selects bulk write in a single transaction\n"
2011 #if CONFIG_IS_ENABLED(DM_I2C)
2012 "i2c flags chip [flags] - set or get chip flags\n"
2013 "i2c olen chip [offset_length] - set or get chip offset length\n"
2015 "i2c reset - re-init the I2C Controller\n"
2016 #if defined(CONFIG_CMD_SDRAM)
2017 "i2c sdram chip - print SDRAM configuration information\n"
2019 "i2c speed [speed] - show or set I2C bus speed";