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>
77 #include <asm/byteorder.h>
78 #include <linux/compiler.h>
79 #include <u-boot/crc.h>
81 /* Display values from last command.
82 * Memory modify remembered values are different from display memory.
84 static uint 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 uint 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 * Default for driver model is to use the chip's existing address length.
122 * For legacy code, this is not stored, so we need to use a suitable
126 #define DEFAULT_ADDR_LEN (-1)
128 #define DEFAULT_ADDR_LEN 1
132 static struct udevice *i2c_cur_bus;
134 static int cmd_i2c_set_bus_num(unsigned int busnum)
139 ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
141 debug("%s: No bus %d\n", __func__, busnum);
149 static int i2c_get_cur_bus(struct udevice **busp)
151 #ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
153 if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER)) {
154 printf("Default I2C bus %d not found\n",
155 CONFIG_I2C_DEFAULT_BUS_NUMBER);
162 puts("No I2C bus selected\n");
170 static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
175 ret = i2c_get_cur_bus(&bus);
179 return i2c_get_chip(bus, chip_addr, 1, devp);
185 * i2c_init_board() - Board-specific I2C bus init
187 * This function is the default no-op implementation of I2C bus
188 * initialization. This function can be overridden by board-specific
189 * implementation if needed.
192 void i2c_init_board(void)
196 /* TODO: Implement architecture-specific get/set functions */
199 * i2c_get_bus_speed() - Return I2C bus speed
201 * This function is the default implementation of function for retrieveing
202 * the current I2C bus speed in Hz.
204 * A driver implementing runtime switching of I2C bus speed must override
205 * this function to report the speed correctly. Simple or legacy drivers
206 * can use this fallback.
208 * Returns I2C bus speed in Hz.
210 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
212 * TODO: Implement architecture-specific get/set functions
213 * Should go away, if we switched completely to new multibus support
216 unsigned int i2c_get_bus_speed(void)
218 return CONFIG_SYS_I2C_SPEED;
222 * i2c_set_bus_speed() - Configure I2C bus speed
223 * @speed: Newly set speed of the I2C bus in Hz
225 * This function is the default implementation of function for setting
226 * the I2C bus speed in Hz.
228 * A driver implementing runtime switching of I2C bus speed must override
229 * this function to report the speed correctly. Simple or legacy drivers
230 * can use this fallback.
232 * Returns zero on success, negative value on error.
235 int i2c_set_bus_speed(unsigned int speed)
237 if (speed != CONFIG_SYS_I2C_SPEED)
245 * get_alen() - Small parser helper function to get address length
247 * Returns the address length.
249 static uint get_alen(char *arg, int default_len)
255 for (j = 0; j < 8; j++) {
257 alen = arg[j+1] - '0';
259 } else if (arg[j] == '\0')
270 static int i2c_report_err(int ret, enum i2c_err_op op)
272 printf("Error %s the chip: %d\n",
273 op == I2C_ERR_READ ? "reading" : "writing", ret);
275 return CMD_RET_FAILURE;
279 * do_i2c_read() - Handle the "i2c read" command-line command
280 * @cmdtp: Command data struct pointer
281 * @flag: Command flag
282 * @argc: Command-line argument count
283 * @argv: Array of command-line arguments
285 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
289 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
291 static int do_i2c_read(struct cmd_tbl *cmdtp, int flag, int argc,
295 uint devaddr, length;
304 return CMD_RET_USAGE;
309 chip = simple_strtoul(argv[1], NULL, 16);
312 * I2C data address within the chip. This can be 1 or
313 * 2 bytes long. Some day it might be 3 bytes long :-).
315 devaddr = simple_strtoul(argv[2], NULL, 16);
316 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
318 return CMD_RET_USAGE;
321 * Length is the number of objects, not number of bytes.
323 length = simple_strtoul(argv[3], NULL, 16);
326 * memaddr is the address where to store things in memory
328 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
331 ret = i2c_get_cur_bus_chip(chip, &dev);
332 if (!ret && alen != -1)
333 ret = i2c_set_chip_offset_len(dev, alen);
335 ret = dm_i2c_read(dev, devaddr, memaddr, length);
337 ret = i2c_read(chip, devaddr, alen, memaddr, length);
340 return i2c_report_err(ret, I2C_ERR_READ);
345 static int do_i2c_write(struct cmd_tbl *cmdtp, int flag, int argc,
349 uint devaddr, length;
355 struct dm_i2c_chip *i2c_chip;
358 if ((argc < 5) || (argc > 6))
359 return cmd_usage(cmdtp);
362 * memaddr is the address where to store things in memory
364 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
369 chip = simple_strtoul(argv[2], NULL, 16);
372 * I2C data address within the chip. This can be 1 or
373 * 2 bytes long. Some day it might be 3 bytes long :-).
375 devaddr = simple_strtoul(argv[3], NULL, 16);
376 alen = get_alen(argv[3], DEFAULT_ADDR_LEN);
378 return cmd_usage(cmdtp);
381 * Length is the number of bytes.
383 length = simple_strtoul(argv[4], NULL, 16);
386 ret = i2c_get_cur_bus_chip(chip, &dev);
387 if (!ret && alen != -1)
388 ret = i2c_set_chip_offset_len(dev, alen);
390 return i2c_report_err(ret, I2C_ERR_WRITE);
391 i2c_chip = dev_get_parent_platdata(dev);
393 return i2c_report_err(ret, I2C_ERR_WRITE);
396 if (argc == 6 && !strcmp(argv[5], "-s")) {
398 * Write all bytes in a single I2C transaction. If the target
399 * device is an EEPROM, it is your responsibility to not cross
400 * a page boundary. No write delay upon completion, take this
401 * into account if linking commands.
404 i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
405 ret = dm_i2c_write(dev, devaddr, memaddr, length);
407 ret = i2c_write(chip, devaddr, alen, memaddr, length);
410 return i2c_report_err(ret, I2C_ERR_WRITE);
413 * Repeated addressing - perform <length> separate
414 * write transactions of one byte each
416 while (length-- > 0) {
418 i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS;
419 ret = dm_i2c_write(dev, devaddr++, memaddr++, 1);
421 ret = i2c_write(chip, devaddr++, alen, memaddr++, 1);
424 return i2c_report_err(ret, I2C_ERR_WRITE);
426 * No write delay with FRAM devices.
428 #if !defined(CONFIG_SYS_I2C_FRAM)
437 static int do_i2c_flags(struct cmd_tbl *cmdtp, int flag, int argc,
446 return CMD_RET_USAGE;
448 chip = simple_strtoul(argv[1], NULL, 16);
449 ret = i2c_get_cur_bus_chip(chip, &dev);
451 return i2c_report_err(ret, I2C_ERR_READ);
454 flags = simple_strtoul(argv[2], NULL, 16);
455 ret = i2c_set_chip_flags(dev, flags);
457 ret = i2c_get_chip_flags(dev, &flags);
459 printf("%x\n", flags);
462 return i2c_report_err(ret, I2C_ERR_READ);
467 static int do_i2c_olen(struct cmd_tbl *cmdtp, int flag, int argc,
476 return CMD_RET_USAGE;
478 chip = simple_strtoul(argv[1], NULL, 16);
479 ret = i2c_get_cur_bus_chip(chip, &dev);
481 return i2c_report_err(ret, I2C_ERR_READ);
484 olen = simple_strtoul(argv[2], NULL, 16);
485 ret = i2c_set_chip_offset_len(dev, olen);
487 ret = i2c_get_chip_offset_len(dev);
494 return i2c_report_err(ret, I2C_ERR_READ);
501 * do_i2c_md() - Handle the "i2c md" command-line command
502 * @cmdtp: Command data struct pointer
503 * @flag: Command flag
504 * @argc: Command-line argument count
505 * @argv: Array of command-line arguments
507 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
511 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
513 static int do_i2c_md(struct cmd_tbl *cmdtp, int flag, int argc,
519 int j, nbytes, linebytes;
525 /* We use the last specified parameters, unless new ones are
528 chip = i2c_dp_last_chip;
529 addr = i2c_dp_last_addr;
530 alen = i2c_dp_last_alen;
531 length = i2c_dp_last_length;
534 return CMD_RET_USAGE;
536 if ((flag & CMD_FLAG_REPEAT) == 0) {
538 * New command specified.
544 chip = simple_strtoul(argv[1], NULL, 16);
547 * I2C data address within the chip. This can be 1 or
548 * 2 bytes long. Some day it might be 3 bytes long :-).
550 addr = simple_strtoul(argv[2], NULL, 16);
551 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
553 return CMD_RET_USAGE;
556 * If another parameter, it is the length to display.
557 * Length is the number of objects, not number of bytes.
560 length = simple_strtoul(argv[3], NULL, 16);
564 ret = i2c_get_cur_bus_chip(chip, &dev);
565 if (!ret && alen != -1)
566 ret = i2c_set_chip_offset_len(dev, alen);
568 return i2c_report_err(ret, I2C_ERR_READ);
574 * We buffer all read data, so we can make sure data is read only
579 unsigned char linebuf[DISP_LINE_LEN];
582 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
585 ret = dm_i2c_read(dev, addr, linebuf, linebytes);
587 ret = i2c_read(chip, addr, alen, linebuf, linebytes);
590 return i2c_report_err(ret, I2C_ERR_READ);
592 printf("%04x:", addr);
594 for (j=0; j<linebytes; j++) {
595 printf(" %02x", *cp++);
600 for (j=0; j<linebytes; j++) {
601 if ((*cp < 0x20) || (*cp > 0x7e))
610 } while (nbytes > 0);
612 i2c_dp_last_chip = chip;
613 i2c_dp_last_addr = addr;
614 i2c_dp_last_alen = alen;
615 i2c_dp_last_length = length;
621 * do_i2c_mw() - Handle the "i2c mw" command-line command
622 * @cmdtp: Command data struct pointer
623 * @flag: Command flag
624 * @argc: Command-line argument count
625 * @argv: Array of command-line arguments
627 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
631 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
633 static int do_i2c_mw(struct cmd_tbl *cmdtp, int flag, int argc,
646 if ((argc < 4) || (argc > 5))
647 return CMD_RET_USAGE;
650 * Chip is always specified.
652 chip = simple_strtoul(argv[1], NULL, 16);
655 * Address is always specified.
657 addr = simple_strtoul(argv[2], NULL, 16);
658 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
660 return CMD_RET_USAGE;
663 ret = i2c_get_cur_bus_chip(chip, &dev);
664 if (!ret && alen != -1)
665 ret = i2c_set_chip_offset_len(dev, alen);
667 return i2c_report_err(ret, I2C_ERR_WRITE);
670 * Value to write is always specified.
672 byte = simple_strtoul(argv[3], NULL, 16);
678 count = simple_strtoul(argv[4], NULL, 16);
682 while (count-- > 0) {
684 ret = dm_i2c_write(dev, addr++, &byte, 1);
686 ret = i2c_write(chip, addr++, alen, &byte, 1);
689 return i2c_report_err(ret, I2C_ERR_WRITE);
691 * Wait for the write to complete. The write can take
692 * up to 10mSec (we allow a little more time).
695 * No write delay with FRAM devices.
697 #if !defined(CONFIG_SYS_I2C_FRAM)
706 * do_i2c_crc() - Handle the "i2c crc32" command-line command
707 * @cmdtp: Command data struct pointer
708 * @flag: Command flag
709 * @argc: Command-line argument count
710 * @argv: Array of command-line arguments
712 * Calculate a CRC on memory
714 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
718 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
720 static int do_i2c_crc(struct cmd_tbl *cmdtp, int flag, int argc,
736 return CMD_RET_USAGE;
739 * Chip is always specified.
741 chip = simple_strtoul(argv[1], NULL, 16);
744 * Address is always specified.
746 addr = simple_strtoul(argv[2], NULL, 16);
747 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
749 return CMD_RET_USAGE;
752 ret = i2c_get_cur_bus_chip(chip, &dev);
753 if (!ret && alen != -1)
754 ret = i2c_set_chip_offset_len(dev, alen);
756 return i2c_report_err(ret, I2C_ERR_READ);
759 * Count is always specified
761 count = simple_strtoul(argv[3], NULL, 16);
763 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
765 * CRC a byte at a time. This is going to be slooow, but hey, the
766 * memories are small and slow too so hopefully nobody notices.
770 while (count-- > 0) {
772 ret = dm_i2c_read(dev, addr, &byte, 1);
774 ret = i2c_read(chip, addr, alen, &byte, 1);
778 crc = crc32(crc, &byte, 1);
782 i2c_report_err(ret, I2C_ERR_READ);
784 printf ("%08lx\n", crc);
790 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
791 * @cmdtp: Command data struct pointer
792 * @flag: Command flag
793 * @argc: Command-line argument count
794 * @argv: Array of command-line arguments
798 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
802 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
803 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
805 static int mod_i2c_mem(struct cmd_tbl *cmdtp, int incrflag, int flag, int argc,
820 return CMD_RET_USAGE;
822 bootretry_reset_cmd_timeout(); /* got a good command to get here */
824 * We use the last specified parameters, unless new ones are
827 chip = i2c_mm_last_chip;
828 addr = i2c_mm_last_addr;
829 alen = i2c_mm_last_alen;
831 if ((flag & CMD_FLAG_REPEAT) == 0) {
833 * New command specified. Check for a size specification.
834 * Defaults to byte if no or incorrect specification.
836 size = cmd_get_data_size(argv[0], 1);
839 * Chip is always specified.
841 chip = simple_strtoul(argv[1], NULL, 16);
844 * Address is always specified.
846 addr = simple_strtoul(argv[2], NULL, 16);
847 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
849 return CMD_RET_USAGE;
853 ret = i2c_get_cur_bus_chip(chip, &dev);
854 if (!ret && alen != -1)
855 ret = i2c_set_chip_offset_len(dev, alen);
857 return i2c_report_err(ret, I2C_ERR_WRITE);
861 * Print the address, followed by value. Then accept input for
862 * the next value. A non-converted value exits.
865 printf("%08lx:", addr);
867 ret = dm_i2c_read(dev, addr, (uchar *)&data, size);
869 ret = i2c_read(chip, addr, alen, (uchar *)&data, size);
872 return i2c_report_err(ret, I2C_ERR_READ);
874 data = cpu_to_be32(data);
876 printf(" %02lx", (data >> 24) & 0x000000FF);
878 printf(" %04lx", (data >> 16) & 0x0000FFFF);
880 printf(" %08lx", data);
882 nbytes = cli_readline(" ? ");
885 * <CR> pressed as only input, don't modify current
886 * location and move to next.
891 /* good enough to not time out */
892 bootretry_reset_cmd_timeout();
894 #ifdef CONFIG_BOOT_RETRY_TIME
895 else if (nbytes == -2)
896 break; /* timed out, exit the command */
901 data = simple_strtoul(console_buffer, &endp, 16);
906 data = be32_to_cpu(data);
907 nbytes = endp - console_buffer;
910 * good enough to not time out
912 bootretry_reset_cmd_timeout();
914 ret = dm_i2c_write(dev, addr, (uchar *)&data,
917 ret = i2c_write(chip, addr, alen,
918 (uchar *)&data, size);
921 return i2c_report_err(ret,
923 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
924 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
932 i2c_mm_last_chip = chip;
933 i2c_mm_last_addr = addr;
934 i2c_mm_last_alen = alen;
940 * do_i2c_probe() - Handle the "i2c probe" command-line command
941 * @cmdtp: Command data struct pointer
942 * @flag: Command flag
943 * @argc: Command-line argument count
944 * @argv: Array of command-line arguments
946 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
952 * Returns zero (success) if one or more I2C devices was found
954 static int do_i2c_probe(struct cmd_tbl *cmdtp, int flag, int argc,
960 #if defined(CONFIG_SYS_I2C_NOPROBES)
962 unsigned int bus = GET_BUS_NUM;
963 #endif /* NOPROBES */
966 struct udevice *bus, *dev;
968 if (i2c_get_cur_bus(&bus))
969 return CMD_RET_FAILURE;
973 addr = simple_strtol(argv[1], 0, 16);
975 puts ("Valid chip addresses:");
976 for (j = 0; j < 128; j++) {
977 if ((0 <= addr) && (j != addr))
980 #if defined(CONFIG_SYS_I2C_NOPROBES)
982 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
983 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
992 ret = dm_i2c_probe(bus, j, 0, &dev);
1003 #if defined(CONFIG_SYS_I2C_NOPROBES)
1004 puts ("Excluded chip addresses:");
1005 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
1006 if (COMPARE_BUS(bus,k))
1007 printf(" %02X", NO_PROBE_ADDR(k));
1012 return (0 == found);
1016 * do_i2c_loop() - Handle the "i2c loop" command-line command
1017 * @cmdtp: Command data struct pointer
1018 * @flag: Command flag
1019 * @argc: Command-line argument count
1020 * @argv: Array of command-line arguments
1022 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1026 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1027 * {length} - Number of bytes to read
1028 * {delay} - A DECIMAL number and defaults to 1000 uSec
1030 static int do_i2c_loop(struct cmd_tbl *cmdtp, int flag, int argc,
1040 #ifdef CONFIG_DM_I2C
1041 struct udevice *dev;
1045 return CMD_RET_USAGE;
1048 * Chip is always specified.
1050 chip = simple_strtoul(argv[1], NULL, 16);
1053 * Address is always specified.
1055 addr = simple_strtoul(argv[2], NULL, 16);
1056 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
1058 return CMD_RET_USAGE;
1059 #ifdef CONFIG_DM_I2C
1060 ret = i2c_get_cur_bus_chip(chip, &dev);
1061 if (!ret && alen != -1)
1062 ret = i2c_set_chip_offset_len(dev, alen);
1064 return i2c_report_err(ret, I2C_ERR_WRITE);
1068 * Length is the number of objects, not number of bytes.
1071 length = simple_strtoul(argv[3], NULL, 16);
1072 if (length > sizeof(bytes))
1073 length = sizeof(bytes);
1076 * The delay time (uSec) is optional.
1080 delay = simple_strtoul(argv[4], NULL, 10);
1085 #ifdef CONFIG_DM_I2C
1086 ret = dm_i2c_read(dev, addr, bytes, length);
1088 ret = i2c_read(chip, addr, alen, bytes, length);
1091 i2c_report_err(ret, I2C_ERR_READ);
1100 * The SDRAM command is separately configured because many
1101 * (most?) embedded boards don't use SDRAM DIMMs.
1103 * FIXME: Document and probably move elsewhere!
1105 #if defined(CONFIG_CMD_SDRAM)
1106 static void print_ddr2_tcyc (u_char const b)
1108 printf ("%d.", (b >> 4) & 0x0F);
1120 printf ("%d ns\n", b & 0x0F);
1140 static void decode_bits (u_char const b, char const *str[], int const do_once)
1144 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
1155 * i2c sdram {i2c_chip}
1157 static int do_sdram(struct cmd_tbl *cmdtp, int flag, int argc,
1160 enum { unknown, EDO, SDRAM, DDR, DDR2, DDR3, DDR4 } type;
1166 #ifdef CONFIG_DM_I2C
1167 struct udevice *dev;
1170 static const char *decode_CAS_DDR2[] = {
1171 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1174 static const char *decode_CAS_default[] = {
1175 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1178 static const char *decode_CS_WE_default[] = {
1179 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1182 static const char *decode_byte21_default[] = {
1184 " Redundant row address\n",
1185 " Differential clock input\n",
1186 " Registerd DQMB inputs\n",
1187 " Buffered DQMB inputs\n",
1189 " Registered address/control lines\n",
1190 " Buffered address/control lines\n"
1193 static const char *decode_byte22_DDR2[] = {
1199 " Supports partial array self refresh\n",
1200 " Supports 50 ohm ODT\n",
1201 " Supports weak driver\n"
1204 static const char *decode_row_density_DDR2[] = {
1205 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1206 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1209 static const char *decode_row_density_default[] = {
1210 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1211 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1215 return CMD_RET_USAGE;
1218 * Chip is always specified.
1220 chip = simple_strtoul (argv[1], NULL, 16);
1222 #ifdef CONFIG_DM_I2C
1223 ret = i2c_get_cur_bus_chip(chip, &dev);
1225 ret = dm_i2c_read(dev, 0, data, sizeof(data));
1227 ret = i2c_read(chip, 0, 1, data, sizeof(data));
1230 puts ("No SDRAM Serial Presence Detect found.\n");
1235 for (j = 0; j < 63; j++) {
1238 if (cksum != data[63]) {
1239 printf ("WARNING: Configuration data checksum failure:\n"
1240 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
1242 printf ("SPD data revision %d.%d\n",
1243 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
1244 printf ("Bytes used 0x%02X\n", data[0]);
1245 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
1247 puts ("Memory type ");
1279 puts ("Row address bits ");
1280 if ((data[3] & 0x00F0) == 0)
1281 printf ("%d\n", data[3] & 0x0F);
1283 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
1285 puts ("Column address bits ");
1286 if ((data[4] & 0x00F0) == 0)
1287 printf ("%d\n", data[4] & 0x0F);
1289 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
1293 printf ("Number of ranks %d\n",
1294 (data[5] & 0x07) + 1);
1297 printf ("Module rows %d\n", data[5]);
1303 printf ("Module data width %d bits\n", data[6]);
1306 printf ("Module data width %d bits\n",
1307 (data[7] << 8) | data[6]);
1311 puts ("Interface signal levels ");
1313 case 0: puts ("TTL 5.0 V\n"); break;
1314 case 1: puts ("LVTTL\n"); break;
1315 case 2: puts ("HSTL 1.5 V\n"); break;
1316 case 3: puts ("SSTL 3.3 V\n"); break;
1317 case 4: puts ("SSTL 2.5 V\n"); break;
1318 case 5: puts ("SSTL 1.8 V\n"); break;
1319 default: puts ("unknown\n"); break;
1324 printf ("SDRAM cycle time ");
1325 print_ddr2_tcyc (data[9]);
1328 printf ("SDRAM cycle time %d.%d ns\n",
1329 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1335 printf ("SDRAM access time 0.%d%d ns\n",
1336 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1339 printf ("SDRAM access time %d.%d ns\n",
1340 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1344 puts ("EDC configuration ");
1346 case 0: puts ("None\n"); break;
1347 case 1: puts ("Parity\n"); break;
1348 case 2: puts ("ECC\n"); break;
1349 default: puts ("unknown\n"); break;
1352 if ((data[12] & 0x80) == 0)
1353 puts ("No self refresh, rate ");
1355 puts ("Self refresh, rate ");
1357 switch(data[12] & 0x7F) {
1358 case 0: puts ("15.625 us\n"); break;
1359 case 1: puts ("3.9 us\n"); break;
1360 case 2: puts ("7.8 us\n"); break;
1361 case 3: puts ("31.3 us\n"); break;
1362 case 4: puts ("62.5 us\n"); break;
1363 case 5: puts ("125 us\n"); break;
1364 default: puts ("unknown\n"); break;
1369 printf ("SDRAM width (primary) %d\n", data[13]);
1372 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1373 if ((data[13] & 0x80) != 0) {
1374 printf (" (second bank) %d\n",
1375 2 * (data[13] & 0x7F));
1383 printf ("EDC width %d\n", data[14]);
1386 if (data[14] != 0) {
1387 printf ("EDC width %d\n",
1390 if ((data[14] & 0x80) != 0) {
1391 printf (" (second bank) %d\n",
1392 2 * (data[14] & 0x7F));
1399 printf ("Min clock delay, back-to-back random column addresses "
1403 puts ("Burst length(s) ");
1404 if (data[16] & 0x80) puts (" Page");
1405 if (data[16] & 0x08) puts (" 8");
1406 if (data[16] & 0x04) puts (" 4");
1407 if (data[16] & 0x02) puts (" 2");
1408 if (data[16] & 0x01) puts (" 1");
1410 printf ("Number of banks %d\n", data[17]);
1414 puts ("CAS latency(s) ");
1415 decode_bits (data[18], decode_CAS_DDR2, 0);
1419 puts ("CAS latency(s) ");
1420 decode_bits (data[18], decode_CAS_default, 0);
1426 puts ("CS latency(s) ");
1427 decode_bits (data[19], decode_CS_WE_default, 0);
1432 puts ("WE latency(s) ");
1433 decode_bits (data[20], decode_CS_WE_default, 0);
1439 puts ("Module attributes:\n");
1440 if (data[21] & 0x80)
1441 puts (" TBD (bit 7)\n");
1442 if (data[21] & 0x40)
1443 puts (" Analysis probe installed\n");
1444 if (data[21] & 0x20)
1445 puts (" TBD (bit 5)\n");
1446 if (data[21] & 0x10)
1447 puts (" FET switch external enable\n");
1448 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1449 if (data[20] & 0x11) {
1450 printf (" %d active registers on DIMM\n",
1451 (data[21] & 0x03) + 1);
1455 puts ("Module attributes:\n");
1459 decode_bits (data[21], decode_byte21_default, 0);
1465 decode_bits (data[22], decode_byte22_DDR2, 0);
1468 puts ("Device attributes:\n");
1469 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1470 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1471 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1472 else puts (" Upper Vcc tolerance 10%\n");
1473 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1474 else puts (" Lower Vcc tolerance 10%\n");
1475 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1476 if (data[22] & 0x04) puts (" Supports precharge all\n");
1477 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1478 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1484 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1485 print_ddr2_tcyc (data[23]);
1488 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1489 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1495 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1496 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1499 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1500 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1506 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1507 print_ddr2_tcyc (data[25]);
1510 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1511 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1517 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1518 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1521 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1522 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1528 printf ("Minimum row precharge %d.%02d ns\n",
1529 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1532 printf ("Minimum row precharge %d ns\n", data[27]);
1538 printf ("Row active to row active min %d.%02d ns\n",
1539 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1542 printf ("Row active to row active min %d ns\n", data[28]);
1548 printf ("RAS to CAS delay min %d.%02d ns\n",
1549 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1552 printf ("RAS to CAS delay min %d ns\n", data[29]);
1556 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1560 puts ("Density of each row ");
1561 decode_bits (data[31], decode_row_density_DDR2, 1);
1565 puts ("Density of each row ");
1566 decode_bits (data[31], decode_row_density_default, 1);
1573 puts ("Command and Address setup ");
1574 if (data[32] >= 0xA0) {
1575 printf ("1.%d%d ns\n",
1576 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1578 printf ("0.%d%d ns\n",
1579 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1583 printf ("Command and Address setup %c%d.%d ns\n",
1584 (data[32] & 0x80) ? '-' : '+',
1585 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1591 puts ("Command and Address hold ");
1592 if (data[33] >= 0xA0) {
1593 printf ("1.%d%d ns\n",
1594 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1596 printf ("0.%d%d ns\n",
1597 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1601 printf ("Command and Address hold %c%d.%d ns\n",
1602 (data[33] & 0x80) ? '-' : '+',
1603 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1609 printf ("Data signal input setup 0.%d%d ns\n",
1610 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1613 printf ("Data signal input setup %c%d.%d ns\n",
1614 (data[34] & 0x80) ? '-' : '+',
1615 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1621 printf ("Data signal input hold 0.%d%d ns\n",
1622 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1625 printf ("Data signal input hold %c%d.%d ns\n",
1626 (data[35] & 0x80) ? '-' : '+',
1627 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1631 puts ("Manufacturer's JEDEC ID ");
1632 for (j = 64; j <= 71; j++)
1633 printf ("%02X ", data[j]);
1635 printf ("Manufacturing Location %02X\n", data[72]);
1636 puts ("Manufacturer's Part Number ");
1637 for (j = 73; j <= 90; j++)
1638 printf ("%02X ", data[j]);
1640 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1641 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1642 puts ("Assembly Serial Number ");
1643 for (j = 95; j <= 98; j++)
1644 printf ("%02X ", data[j]);
1648 printf ("Speed rating PC%d\n",
1649 data[126] == 0x66 ? 66 : data[126]);
1657 * i2c edid {i2c_chip}
1659 #if defined(CONFIG_I2C_EDID)
1660 int do_edid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
1663 struct edid1_info edid;
1665 #ifdef CONFIG_DM_I2C
1666 struct udevice *dev;
1674 chip = simple_strtoul(argv[1], NULL, 16);
1675 #ifdef CONFIG_DM_I2C
1676 ret = i2c_get_cur_bus_chip(chip, &dev);
1678 ret = dm_i2c_read(dev, 0, (uchar *)&edid, sizeof(edid));
1680 ret = i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid));
1683 return i2c_report_err(ret, I2C_ERR_READ);
1685 if (edid_check_info(&edid)) {
1686 puts("Content isn't valid EDID.\n");
1690 edid_print_info(&edid);
1694 #endif /* CONFIG_I2C_EDID */
1696 #ifdef CONFIG_DM_I2C
1697 static void show_bus(struct udevice *bus)
1699 struct udevice *dev;
1701 printf("Bus %d:\t%s", bus->req_seq, bus->name);
1702 if (device_active(bus))
1703 printf(" (active %d)", bus->seq);
1705 for (device_find_first_child(bus, &dev);
1707 device_find_next_child(&dev)) {
1708 struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
1710 printf(" %02x: %s, offset len %x, flags %x\n",
1711 chip->chip_addr, dev->name, chip->offset_len,
1718 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1719 * @cmdtp: Command data struct pointer
1720 * @flag: Command flag
1721 * @argc: Command-line argument count
1722 * @argv: Array of command-line arguments
1724 * Returns zero always.
1726 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1727 static int do_i2c_show_bus(struct cmd_tbl *cmdtp, int flag, int argc,
1731 /* show all busses */
1732 #ifdef CONFIG_DM_I2C
1733 struct udevice *bus;
1737 ret = uclass_get(UCLASS_I2C, &uc);
1739 return CMD_RET_FAILURE;
1740 uclass_foreach_dev(bus, uc)
1745 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1746 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1747 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1750 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1751 if (i2c_bus[i].next_hop[j].chip == 0)
1753 printf("->%s@0x%2x:%d",
1754 i2c_bus[i].next_hop[j].mux.name,
1755 i2c_bus[i].next_hop[j].chip,
1756 i2c_bus[i].next_hop[j].channel);
1765 /* show specific bus */
1766 i = simple_strtoul(argv[1], NULL, 10);
1767 #ifdef CONFIG_DM_I2C
1768 struct udevice *bus;
1771 ret = uclass_get_device_by_seq(UCLASS_I2C, i, &bus);
1773 printf("Invalid bus %d: err=%d\n", i, ret);
1774 return CMD_RET_FAILURE;
1778 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1779 printf("Invalid bus %d\n", i);
1782 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1783 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1785 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1786 if (i2c_bus[i].next_hop[j].chip == 0)
1788 printf("->%s@0x%2x:%d",
1789 i2c_bus[i].next_hop[j].mux.name,
1790 i2c_bus[i].next_hop[j].chip,
1791 i2c_bus[i].next_hop[j].channel);
1803 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1804 * @cmdtp: Command data struct pointer
1805 * @flag: Command flag
1806 * @argc: Command-line argument count
1807 * @argv: Array of command-line arguments
1809 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1812 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1813 defined(CONFIG_DM_I2C)
1814 static int do_i2c_bus_num(struct cmd_tbl *cmdtp, int flag, int argc,
1821 /* querying current setting */
1822 #ifdef CONFIG_DM_I2C
1823 struct udevice *bus;
1825 if (!i2c_get_cur_bus(&bus))
1830 bus_no = i2c_get_bus_num();
1832 printf("Current bus is %d\n", bus_no);
1834 bus_no = simple_strtoul(argv[1], NULL, 10);
1835 #if defined(CONFIG_SYS_I2C)
1836 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1837 printf("Invalid bus %d\n", bus_no);
1841 printf("Setting bus to %d\n", bus_no);
1842 #ifdef CONFIG_DM_I2C
1843 ret = cmd_i2c_set_bus_num(bus_no);
1845 ret = i2c_set_bus_num(bus_no);
1848 printf("Failure changing bus number (%d)\n", ret);
1851 return ret ? CMD_RET_FAILURE : 0;
1853 #endif /* defined(CONFIG_SYS_I2C) */
1856 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1857 * @cmdtp: Command data struct pointer
1858 * @flag: Command flag
1859 * @argc: Command-line argument count
1860 * @argv: Array of command-line arguments
1862 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1865 static int do_i2c_bus_speed(struct cmd_tbl *cmdtp, int flag, int argc,
1870 #ifdef CONFIG_DM_I2C
1871 struct udevice *bus;
1873 if (i2c_get_cur_bus(&bus))
1877 #ifdef CONFIG_DM_I2C
1878 speed = dm_i2c_get_bus_speed(bus);
1880 speed = i2c_get_bus_speed();
1882 /* querying current speed */
1883 printf("Current bus speed=%d\n", speed);
1885 speed = simple_strtoul(argv[1], NULL, 10);
1886 printf("Setting bus speed to %d Hz\n", speed);
1887 #ifdef CONFIG_DM_I2C
1888 ret = dm_i2c_set_bus_speed(bus, speed);
1890 ret = i2c_set_bus_speed(speed);
1893 printf("Failure changing bus speed (%d)\n", ret);
1896 return ret ? CMD_RET_FAILURE : 0;
1900 * do_i2c_mm() - Handle the "i2c mm" command-line command
1901 * @cmdtp: Command data struct pointer
1902 * @flag: Command flag
1903 * @argc: Command-line argument count
1904 * @argv: Array of command-line arguments
1906 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1909 static int do_i2c_mm(struct cmd_tbl *cmdtp, int flag, int argc,
1912 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1916 * do_i2c_nm() - Handle the "i2c nm" command-line command
1917 * @cmdtp: Command data struct pointer
1918 * @flag: Command flag
1919 * @argc: Command-line argument count
1920 * @argv: Array of command-line arguments
1922 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1925 static int do_i2c_nm(struct cmd_tbl *cmdtp, int flag, int argc,
1928 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1932 * do_i2c_reset() - Handle the "i2c reset" command-line command
1933 * @cmdtp: Command data struct pointer
1934 * @flag: Command flag
1935 * @argc: Command-line argument count
1936 * @argv: Array of command-line arguments
1938 * Returns zero always.
1940 static int do_i2c_reset(struct cmd_tbl *cmdtp, int flag, int argc,
1943 #if defined(CONFIG_DM_I2C)
1944 struct udevice *bus;
1946 if (i2c_get_cur_bus(&bus))
1947 return CMD_RET_FAILURE;
1948 if (i2c_deblock(bus)) {
1949 printf("Error: Not supported by the driver\n");
1950 return CMD_RET_FAILURE;
1952 #elif defined(CONFIG_SYS_I2C)
1953 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1955 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1960 static struct cmd_tbl cmd_i2c_sub[] = {
1961 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1962 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1964 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1965 #if defined(CONFIG_SYS_I2C) || \
1966 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1967 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1968 #endif /* CONFIG_I2C_MULTI_BUS */
1969 #if defined(CONFIG_I2C_EDID)
1970 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1971 #endif /* CONFIG_I2C_EDID */
1972 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1973 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1974 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1975 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1976 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1977 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1978 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1979 U_BOOT_CMD_MKENT(write, 6, 0, do_i2c_write, "", ""),
1980 #ifdef CONFIG_DM_I2C
1981 U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""),
1982 U_BOOT_CMD_MKENT(olen, 2, 1, do_i2c_olen, "", ""),
1984 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1985 #if defined(CONFIG_CMD_SDRAM)
1986 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1988 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1991 static __maybe_unused void i2c_reloc(void)
1993 static int relocated;
1996 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
2002 * do_i2c() - Handle the "i2c" command-line command
2003 * @cmdtp: Command data struct pointer
2004 * @flag: Command flag
2005 * @argc: Command-line argument count
2006 * @argv: Array of command-line arguments
2008 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
2011 static int do_i2c(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
2015 #ifdef CONFIG_NEEDS_MANUAL_RELOC
2020 return CMD_RET_USAGE;
2022 /* Strip off leading 'i2c' command argument */
2026 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
2029 return c->cmd(cmdtp, flag, argc, argv);
2031 return CMD_RET_USAGE;
2034 /***************************************************/
2035 #ifdef CONFIG_SYS_LONGHELP
2036 static char i2c_help_text[] =
2037 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
2038 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
2039 "i2c " /* That's the prefix for the crc32 command below. */
2041 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
2042 #if defined(CONFIG_SYS_I2C) || \
2043 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
2044 "i2c dev [dev] - show or set current I2C bus\n"
2045 #endif /* CONFIG_I2C_MULTI_BUS */
2046 #if defined(CONFIG_I2C_EDID)
2047 "i2c edid chip - print EDID configuration information\n"
2048 #endif /* CONFIG_I2C_EDID */
2049 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2050 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2051 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2052 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2053 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2054 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2055 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2056 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2057 " to I2C; the -s option selects bulk write in a single transaction\n"
2058 #ifdef CONFIG_DM_I2C
2059 "i2c flags chip [flags] - set or get chip flags\n"
2060 "i2c olen chip [offset_length] - set or get chip offset length\n"
2062 "i2c reset - re-init the I2C Controller\n"
2063 #if defined(CONFIG_CMD_SDRAM)
2064 "i2c sdram chip - print SDRAM configuration information\n"
2066 "i2c speed [speed] - show or set I2C bus speed";