1 // SPDX-License-Identifier: GPL-2.0+
6 * Changes for unified multibus/multiadapter I2C support.
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.
68 #include <bootretry.h>
78 #include <asm/byteorder.h>
79 #include <linux/compiler.h>
80 #include <u-boot/crc.h>
82 /* Display values from last command.
83 * Memory modify remembered values are different from display memory.
85 static uint i2c_dp_last_chip;
86 static uint i2c_dp_last_addr;
87 static uint i2c_dp_last_alen;
88 static uint i2c_dp_last_length = 0x10;
90 static uint i2c_mm_last_chip;
91 static uint i2c_mm_last_addr;
92 static uint i2c_mm_last_alen;
94 /* If only one I2C bus is present, the list of devices to ignore when
95 * the probe command is issued is represented by a 1D array of addresses.
96 * When multiple buses are present, the list is an array of bus-address
97 * pairs. The following macros take care of this */
99 #if defined(CONFIG_SYS_I2C_NOPROBES)
100 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
105 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
106 #define GET_BUS_NUM i2c_get_bus_num()
107 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
108 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
109 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
110 #else /* single bus */
111 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
112 #define GET_BUS_NUM 0
113 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
114 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
115 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
116 #endif /* defined(CONFIG_SYS_I2C) */
119 #define DISP_LINE_LEN 16
122 * Default for driver model is to use the chip's existing address length.
123 * For legacy code, this is not stored, so we need to use a suitable
127 #define DEFAULT_ADDR_LEN (-1)
129 #define DEFAULT_ADDR_LEN 1
133 static struct udevice *i2c_cur_bus;
135 static int cmd_i2c_set_bus_num(unsigned int busnum)
140 ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
142 debug("%s: No bus %d\n", __func__, busnum);
150 static int i2c_get_cur_bus(struct udevice **busp)
152 #ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
154 if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER)) {
155 printf("Default I2C bus %d not found\n",
156 CONFIG_I2C_DEFAULT_BUS_NUMBER);
163 puts("No I2C bus selected\n");
171 static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
176 ret = i2c_get_cur_bus(&bus);
180 return i2c_get_chip(bus, chip_addr, 1, devp);
186 * i2c_init_board() - Board-specific I2C bus init
188 * This function is the default no-op implementation of I2C bus
189 * initialization. This function can be overridden by board-specific
190 * implementation if needed.
193 void i2c_init_board(void)
197 /* TODO: Implement architecture-specific get/set functions */
200 * i2c_get_bus_speed() - Return I2C bus speed
202 * This function is the default implementation of function for retrieveing
203 * the current I2C bus speed in Hz.
205 * A driver implementing runtime switching of I2C bus speed must override
206 * this function to report the speed correctly. Simple or legacy drivers
207 * can use this fallback.
209 * Returns I2C bus speed in Hz.
211 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
213 * TODO: Implement architecture-specific get/set functions
214 * Should go away, if we switched completely to new multibus support
217 unsigned int i2c_get_bus_speed(void)
219 return CONFIG_SYS_I2C_SPEED;
223 * i2c_set_bus_speed() - Configure I2C bus speed
224 * @speed: Newly set speed of the I2C bus in Hz
226 * This function is the default implementation of function for setting
227 * the I2C bus speed in Hz.
229 * A driver implementing runtime switching of I2C bus speed must override
230 * this function to report the speed correctly. Simple or legacy drivers
231 * can use this fallback.
233 * Returns zero on success, negative value on error.
236 int i2c_set_bus_speed(unsigned int speed)
238 if (speed != CONFIG_SYS_I2C_SPEED)
246 * get_alen() - Small parser helper function to get address length
248 * Returns the address length.
250 static uint get_alen(char *arg, int default_len)
256 for (j = 0; j < 8; j++) {
258 alen = arg[j+1] - '0';
260 } else if (arg[j] == '\0')
271 static int i2c_report_err(int ret, enum i2c_err_op op)
273 printf("Error %s the chip: %d\n",
274 op == I2C_ERR_READ ? "reading" : "writing", ret);
276 return CMD_RET_FAILURE;
280 * do_i2c_read() - Handle the "i2c read" command-line command
281 * @cmdtp: Command data struct pointer
282 * @flag: Command flag
283 * @argc: Command-line argument count
284 * @argv: Array of command-line arguments
286 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
290 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
292 static int do_i2c_read(struct cmd_tbl *cmdtp, int flag, int argc,
296 uint devaddr, length;
305 return CMD_RET_USAGE;
310 chip = simple_strtoul(argv[1], NULL, 16);
313 * I2C data address within the chip. This can be 1 or
314 * 2 bytes long. Some day it might be 3 bytes long :-).
316 devaddr = simple_strtoul(argv[2], NULL, 16);
317 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
319 return CMD_RET_USAGE;
322 * Length is the number of objects, not number of bytes.
324 length = simple_strtoul(argv[3], NULL, 16);
327 * memaddr is the address where to store things in memory
329 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
332 ret = i2c_get_cur_bus_chip(chip, &dev);
333 if (!ret && alen != -1)
334 ret = i2c_set_chip_offset_len(dev, alen);
336 ret = dm_i2c_read(dev, devaddr, memaddr, length);
338 ret = i2c_read(chip, devaddr, alen, memaddr, length);
341 return i2c_report_err(ret, I2C_ERR_READ);
346 static int do_i2c_write(struct cmd_tbl *cmdtp, int flag, int argc,
350 uint devaddr, length;
356 struct dm_i2c_chip *i2c_chip;
359 if ((argc < 5) || (argc > 6))
360 return cmd_usage(cmdtp);
363 * memaddr is the address where to store things in memory
365 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
370 chip = simple_strtoul(argv[2], NULL, 16);
373 * I2C data address within the chip. This can be 1 or
374 * 2 bytes long. Some day it might be 3 bytes long :-).
376 devaddr = simple_strtoul(argv[3], NULL, 16);
377 alen = get_alen(argv[3], DEFAULT_ADDR_LEN);
379 return cmd_usage(cmdtp);
382 * Length is the number of bytes.
384 length = simple_strtoul(argv[4], NULL, 16);
387 ret = i2c_get_cur_bus_chip(chip, &dev);
388 if (!ret && alen != -1)
389 ret = i2c_set_chip_offset_len(dev, alen);
391 return i2c_report_err(ret, I2C_ERR_WRITE);
392 i2c_chip = dev_get_parent_platdata(dev);
394 return i2c_report_err(ret, I2C_ERR_WRITE);
397 if (argc == 6 && !strcmp(argv[5], "-s")) {
399 * Write all bytes in a single I2C transaction. If the target
400 * device is an EEPROM, it is your responsibility to not cross
401 * a page boundary. No write delay upon completion, take this
402 * into account if linking commands.
405 i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
406 ret = dm_i2c_write(dev, devaddr, memaddr, length);
408 ret = i2c_write(chip, devaddr, alen, memaddr, length);
411 return i2c_report_err(ret, I2C_ERR_WRITE);
414 * Repeated addressing - perform <length> separate
415 * write transactions of one byte each
417 while (length-- > 0) {
419 i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS;
420 ret = dm_i2c_write(dev, devaddr++, memaddr++, 1);
422 ret = i2c_write(chip, devaddr++, alen, memaddr++, 1);
425 return i2c_report_err(ret, I2C_ERR_WRITE);
427 * No write delay with FRAM devices.
429 #if !defined(CONFIG_SYS_I2C_FRAM)
438 static int do_i2c_flags(struct cmd_tbl *cmdtp, int flag, int argc,
447 return CMD_RET_USAGE;
449 chip = simple_strtoul(argv[1], NULL, 16);
450 ret = i2c_get_cur_bus_chip(chip, &dev);
452 return i2c_report_err(ret, I2C_ERR_READ);
455 flags = simple_strtoul(argv[2], NULL, 16);
456 ret = i2c_set_chip_flags(dev, flags);
458 ret = i2c_get_chip_flags(dev, &flags);
460 printf("%x\n", flags);
463 return i2c_report_err(ret, I2C_ERR_READ);
468 static int do_i2c_olen(struct cmd_tbl *cmdtp, int flag, int argc,
477 return CMD_RET_USAGE;
479 chip = simple_strtoul(argv[1], NULL, 16);
480 ret = i2c_get_cur_bus_chip(chip, &dev);
482 return i2c_report_err(ret, I2C_ERR_READ);
485 olen = simple_strtoul(argv[2], NULL, 16);
486 ret = i2c_set_chip_offset_len(dev, olen);
488 ret = i2c_get_chip_offset_len(dev);
495 return i2c_report_err(ret, I2C_ERR_READ);
502 * do_i2c_md() - Handle the "i2c md" command-line command
503 * @cmdtp: Command data struct pointer
504 * @flag: Command flag
505 * @argc: Command-line argument count
506 * @argv: Array of command-line arguments
508 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
512 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
514 static int do_i2c_md(struct cmd_tbl *cmdtp, int flag, int argc,
520 int j, nbytes, linebytes;
526 /* We use the last specified parameters, unless new ones are
529 chip = i2c_dp_last_chip;
530 addr = i2c_dp_last_addr;
531 alen = i2c_dp_last_alen;
532 length = i2c_dp_last_length;
535 return CMD_RET_USAGE;
537 if ((flag & CMD_FLAG_REPEAT) == 0) {
539 * New command specified.
545 chip = simple_strtoul(argv[1], NULL, 16);
548 * I2C data address within the chip. This can be 1 or
549 * 2 bytes long. Some day it might be 3 bytes long :-).
551 addr = simple_strtoul(argv[2], NULL, 16);
552 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
554 return CMD_RET_USAGE;
557 * If another parameter, it is the length to display.
558 * Length is the number of objects, not number of bytes.
561 length = simple_strtoul(argv[3], NULL, 16);
565 ret = i2c_get_cur_bus_chip(chip, &dev);
566 if (!ret && alen != -1)
567 ret = i2c_set_chip_offset_len(dev, alen);
569 return i2c_report_err(ret, I2C_ERR_READ);
575 * We buffer all read data, so we can make sure data is read only
580 unsigned char linebuf[DISP_LINE_LEN];
583 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
586 ret = dm_i2c_read(dev, addr, linebuf, linebytes);
588 ret = i2c_read(chip, addr, alen, linebuf, linebytes);
591 return i2c_report_err(ret, I2C_ERR_READ);
593 printf("%04x:", addr);
595 for (j=0; j<linebytes; j++) {
596 printf(" %02x", *cp++);
601 for (j=0; j<linebytes; j++) {
602 if ((*cp < 0x20) || (*cp > 0x7e))
611 } while (nbytes > 0);
613 i2c_dp_last_chip = chip;
614 i2c_dp_last_addr = addr;
615 i2c_dp_last_alen = alen;
616 i2c_dp_last_length = length;
622 * do_i2c_mw() - Handle the "i2c mw" command-line command
623 * @cmdtp: Command data struct pointer
624 * @flag: Command flag
625 * @argc: Command-line argument count
626 * @argv: Array of command-line arguments
628 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
632 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
634 static int do_i2c_mw(struct cmd_tbl *cmdtp, int flag, int argc,
647 if ((argc < 4) || (argc > 5))
648 return CMD_RET_USAGE;
651 * Chip is always specified.
653 chip = simple_strtoul(argv[1], NULL, 16);
656 * Address is always specified.
658 addr = simple_strtoul(argv[2], NULL, 16);
659 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
661 return CMD_RET_USAGE;
664 ret = i2c_get_cur_bus_chip(chip, &dev);
665 if (!ret && alen != -1)
666 ret = i2c_set_chip_offset_len(dev, alen);
668 return i2c_report_err(ret, I2C_ERR_WRITE);
671 * Value to write is always specified.
673 byte = simple_strtoul(argv[3], NULL, 16);
679 count = simple_strtoul(argv[4], NULL, 16);
683 while (count-- > 0) {
685 ret = dm_i2c_write(dev, addr++, &byte, 1);
687 ret = i2c_write(chip, addr++, alen, &byte, 1);
690 return i2c_report_err(ret, I2C_ERR_WRITE);
692 * Wait for the write to complete. The write can take
693 * up to 10mSec (we allow a little more time).
696 * No write delay with FRAM devices.
698 #if !defined(CONFIG_SYS_I2C_FRAM)
707 * do_i2c_crc() - Handle the "i2c crc32" command-line command
708 * @cmdtp: Command data struct pointer
709 * @flag: Command flag
710 * @argc: Command-line argument count
711 * @argv: Array of command-line arguments
713 * Calculate a CRC on memory
715 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
719 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
721 static int do_i2c_crc(struct cmd_tbl *cmdtp, int flag, int argc,
737 return CMD_RET_USAGE;
740 * Chip is always specified.
742 chip = simple_strtoul(argv[1], NULL, 16);
745 * Address is always specified.
747 addr = simple_strtoul(argv[2], NULL, 16);
748 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
750 return CMD_RET_USAGE;
753 ret = i2c_get_cur_bus_chip(chip, &dev);
754 if (!ret && alen != -1)
755 ret = i2c_set_chip_offset_len(dev, alen);
757 return i2c_report_err(ret, I2C_ERR_READ);
760 * Count is always specified
762 count = simple_strtoul(argv[3], NULL, 16);
764 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
766 * CRC a byte at a time. This is going to be slooow, but hey, the
767 * memories are small and slow too so hopefully nobody notices.
771 while (count-- > 0) {
773 ret = dm_i2c_read(dev, addr, &byte, 1);
775 ret = i2c_read(chip, addr, alen, &byte, 1);
779 crc = crc32(crc, &byte, 1);
783 i2c_report_err(ret, I2C_ERR_READ);
785 printf ("%08lx\n", crc);
791 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
792 * @cmdtp: Command data struct pointer
793 * @flag: Command flag
794 * @argc: Command-line argument count
795 * @argv: Array of command-line arguments
799 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
803 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
804 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
806 static int mod_i2c_mem(struct cmd_tbl *cmdtp, int incrflag, int flag, int argc,
821 return CMD_RET_USAGE;
823 bootretry_reset_cmd_timeout(); /* got a good command to get here */
825 * We use the last specified parameters, unless new ones are
828 chip = i2c_mm_last_chip;
829 addr = i2c_mm_last_addr;
830 alen = i2c_mm_last_alen;
832 if ((flag & CMD_FLAG_REPEAT) == 0) {
834 * New command specified. Check for a size specification.
835 * Defaults to byte if no or incorrect specification.
837 size = cmd_get_data_size(argv[0], 1);
840 * Chip is always specified.
842 chip = simple_strtoul(argv[1], NULL, 16);
845 * Address is always specified.
847 addr = simple_strtoul(argv[2], NULL, 16);
848 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
850 return CMD_RET_USAGE;
854 ret = i2c_get_cur_bus_chip(chip, &dev);
855 if (!ret && alen != -1)
856 ret = i2c_set_chip_offset_len(dev, alen);
858 return i2c_report_err(ret, I2C_ERR_WRITE);
862 * Print the address, followed by value. Then accept input for
863 * the next value. A non-converted value exits.
866 printf("%08lx:", addr);
868 ret = dm_i2c_read(dev, addr, (uchar *)&data, size);
870 ret = i2c_read(chip, addr, alen, (uchar *)&data, size);
873 return i2c_report_err(ret, I2C_ERR_READ);
875 data = cpu_to_be32(data);
877 printf(" %02lx", (data >> 24) & 0x000000FF);
879 printf(" %04lx", (data >> 16) & 0x0000FFFF);
881 printf(" %08lx", data);
883 nbytes = cli_readline(" ? ");
886 * <CR> pressed as only input, don't modify current
887 * location and move to next.
892 /* good enough to not time out */
893 bootretry_reset_cmd_timeout();
895 #ifdef CONFIG_BOOT_RETRY_TIME
896 else if (nbytes == -2)
897 break; /* timed out, exit the command */
902 data = simple_strtoul(console_buffer, &endp, 16);
907 data = be32_to_cpu(data);
908 nbytes = endp - console_buffer;
911 * good enough to not time out
913 bootretry_reset_cmd_timeout();
915 ret = dm_i2c_write(dev, addr, (uchar *)&data,
918 ret = i2c_write(chip, addr, alen,
919 (uchar *)&data, size);
922 return i2c_report_err(ret,
924 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
925 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
933 i2c_mm_last_chip = chip;
934 i2c_mm_last_addr = addr;
935 i2c_mm_last_alen = alen;
941 * do_i2c_probe() - Handle the "i2c probe" command-line command
942 * @cmdtp: Command data struct pointer
943 * @flag: Command flag
944 * @argc: Command-line argument count
945 * @argv: Array of command-line arguments
947 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
953 * Returns zero (success) if one or more I2C devices was found
955 static int do_i2c_probe(struct cmd_tbl *cmdtp, int flag, int argc,
961 #if defined(CONFIG_SYS_I2C_NOPROBES)
963 unsigned int bus = GET_BUS_NUM;
964 #endif /* NOPROBES */
967 struct udevice *bus, *dev;
969 if (i2c_get_cur_bus(&bus))
970 return CMD_RET_FAILURE;
974 addr = simple_strtol(argv[1], 0, 16);
976 puts ("Valid chip addresses:");
977 for (j = 0; j < 128; j++) {
978 if ((0 <= addr) && (j != addr))
981 #if defined(CONFIG_SYS_I2C_NOPROBES)
983 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
984 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
993 ret = dm_i2c_probe(bus, j, 0, &dev);
1004 #if defined(CONFIG_SYS_I2C_NOPROBES)
1005 puts ("Excluded chip addresses:");
1006 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
1007 if (COMPARE_BUS(bus,k))
1008 printf(" %02X", NO_PROBE_ADDR(k));
1013 return (0 == found);
1017 * do_i2c_loop() - Handle the "i2c loop" command-line command
1018 * @cmdtp: Command data struct pointer
1019 * @flag: Command flag
1020 * @argc: Command-line argument count
1021 * @argv: Array of command-line arguments
1023 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1027 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1028 * {length} - Number of bytes to read
1029 * {delay} - A DECIMAL number and defaults to 1000 uSec
1031 static int do_i2c_loop(struct cmd_tbl *cmdtp, int flag, int argc,
1041 #ifdef CONFIG_DM_I2C
1042 struct udevice *dev;
1046 return CMD_RET_USAGE;
1049 * Chip is always specified.
1051 chip = simple_strtoul(argv[1], NULL, 16);
1054 * Address is always specified.
1056 addr = simple_strtoul(argv[2], NULL, 16);
1057 alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
1059 return CMD_RET_USAGE;
1060 #ifdef CONFIG_DM_I2C
1061 ret = i2c_get_cur_bus_chip(chip, &dev);
1062 if (!ret && alen != -1)
1063 ret = i2c_set_chip_offset_len(dev, alen);
1065 return i2c_report_err(ret, I2C_ERR_WRITE);
1069 * Length is the number of objects, not number of bytes.
1072 length = simple_strtoul(argv[3], NULL, 16);
1073 if (length > sizeof(bytes))
1074 length = sizeof(bytes);
1077 * The delay time (uSec) is optional.
1081 delay = simple_strtoul(argv[4], NULL, 10);
1086 #ifdef CONFIG_DM_I2C
1087 ret = dm_i2c_read(dev, addr, bytes, length);
1089 ret = i2c_read(chip, addr, alen, bytes, length);
1092 i2c_report_err(ret, I2C_ERR_READ);
1101 * The SDRAM command is separately configured because many
1102 * (most?) embedded boards don't use SDRAM DIMMs.
1104 * FIXME: Document and probably move elsewhere!
1106 #if defined(CONFIG_CMD_SDRAM)
1107 static void print_ddr2_tcyc (u_char const b)
1109 printf ("%d.", (b >> 4) & 0x0F);
1121 printf ("%d ns\n", b & 0x0F);
1141 static void decode_bits (u_char const b, char const *str[], int const do_once)
1145 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
1156 * i2c sdram {i2c_chip}
1158 static int do_sdram(struct cmd_tbl *cmdtp, int flag, int argc,
1161 enum { unknown, EDO, SDRAM, DDR, DDR2, DDR3, DDR4 } type;
1167 #ifdef CONFIG_DM_I2C
1168 struct udevice *dev;
1171 static const char *decode_CAS_DDR2[] = {
1172 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1175 static const char *decode_CAS_default[] = {
1176 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1179 static const char *decode_CS_WE_default[] = {
1180 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1183 static const char *decode_byte21_default[] = {
1185 " Redundant row address\n",
1186 " Differential clock input\n",
1187 " Registerd DQMB inputs\n",
1188 " Buffered DQMB inputs\n",
1190 " Registered address/control lines\n",
1191 " Buffered address/control lines\n"
1194 static const char *decode_byte22_DDR2[] = {
1200 " Supports partial array self refresh\n",
1201 " Supports 50 ohm ODT\n",
1202 " Supports weak driver\n"
1205 static const char *decode_row_density_DDR2[] = {
1206 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1207 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1210 static const char *decode_row_density_default[] = {
1211 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1212 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1216 return CMD_RET_USAGE;
1219 * Chip is always specified.
1221 chip = simple_strtoul (argv[1], NULL, 16);
1223 #ifdef CONFIG_DM_I2C
1224 ret = i2c_get_cur_bus_chip(chip, &dev);
1226 ret = dm_i2c_read(dev, 0, data, sizeof(data));
1228 ret = i2c_read(chip, 0, 1, data, sizeof(data));
1231 puts ("No SDRAM Serial Presence Detect found.\n");
1236 for (j = 0; j < 63; j++) {
1239 if (cksum != data[63]) {
1240 printf ("WARNING: Configuration data checksum failure:\n"
1241 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
1243 printf ("SPD data revision %d.%d\n",
1244 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
1245 printf ("Bytes used 0x%02X\n", data[0]);
1246 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
1248 puts ("Memory type ");
1280 puts ("Row address bits ");
1281 if ((data[3] & 0x00F0) == 0)
1282 printf ("%d\n", data[3] & 0x0F);
1284 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
1286 puts ("Column address bits ");
1287 if ((data[4] & 0x00F0) == 0)
1288 printf ("%d\n", data[4] & 0x0F);
1290 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
1294 printf ("Number of ranks %d\n",
1295 (data[5] & 0x07) + 1);
1298 printf ("Module rows %d\n", data[5]);
1304 printf ("Module data width %d bits\n", data[6]);
1307 printf ("Module data width %d bits\n",
1308 (data[7] << 8) | data[6]);
1312 puts ("Interface signal levels ");
1314 case 0: puts ("TTL 5.0 V\n"); break;
1315 case 1: puts ("LVTTL\n"); break;
1316 case 2: puts ("HSTL 1.5 V\n"); break;
1317 case 3: puts ("SSTL 3.3 V\n"); break;
1318 case 4: puts ("SSTL 2.5 V\n"); break;
1319 case 5: puts ("SSTL 1.8 V\n"); break;
1320 default: puts ("unknown\n"); break;
1325 printf ("SDRAM cycle time ");
1326 print_ddr2_tcyc (data[9]);
1329 printf ("SDRAM cycle time %d.%d ns\n",
1330 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1336 printf ("SDRAM access time 0.%d%d ns\n",
1337 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1340 printf ("SDRAM access time %d.%d ns\n",
1341 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1345 puts ("EDC configuration ");
1347 case 0: puts ("None\n"); break;
1348 case 1: puts ("Parity\n"); break;
1349 case 2: puts ("ECC\n"); break;
1350 default: puts ("unknown\n"); break;
1353 if ((data[12] & 0x80) == 0)
1354 puts ("No self refresh, rate ");
1356 puts ("Self refresh, rate ");
1358 switch(data[12] & 0x7F) {
1359 case 0: puts ("15.625 us\n"); break;
1360 case 1: puts ("3.9 us\n"); break;
1361 case 2: puts ("7.8 us\n"); break;
1362 case 3: puts ("31.3 us\n"); break;
1363 case 4: puts ("62.5 us\n"); break;
1364 case 5: puts ("125 us\n"); break;
1365 default: puts ("unknown\n"); break;
1370 printf ("SDRAM width (primary) %d\n", data[13]);
1373 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1374 if ((data[13] & 0x80) != 0) {
1375 printf (" (second bank) %d\n",
1376 2 * (data[13] & 0x7F));
1384 printf ("EDC width %d\n", data[14]);
1387 if (data[14] != 0) {
1388 printf ("EDC width %d\n",
1391 if ((data[14] & 0x80) != 0) {
1392 printf (" (second bank) %d\n",
1393 2 * (data[14] & 0x7F));
1400 printf ("Min clock delay, back-to-back random column addresses "
1404 puts ("Burst length(s) ");
1405 if (data[16] & 0x80) puts (" Page");
1406 if (data[16] & 0x08) puts (" 8");
1407 if (data[16] & 0x04) puts (" 4");
1408 if (data[16] & 0x02) puts (" 2");
1409 if (data[16] & 0x01) puts (" 1");
1411 printf ("Number of banks %d\n", data[17]);
1415 puts ("CAS latency(s) ");
1416 decode_bits (data[18], decode_CAS_DDR2, 0);
1420 puts ("CAS latency(s) ");
1421 decode_bits (data[18], decode_CAS_default, 0);
1427 puts ("CS latency(s) ");
1428 decode_bits (data[19], decode_CS_WE_default, 0);
1433 puts ("WE latency(s) ");
1434 decode_bits (data[20], decode_CS_WE_default, 0);
1440 puts ("Module attributes:\n");
1441 if (data[21] & 0x80)
1442 puts (" TBD (bit 7)\n");
1443 if (data[21] & 0x40)
1444 puts (" Analysis probe installed\n");
1445 if (data[21] & 0x20)
1446 puts (" TBD (bit 5)\n");
1447 if (data[21] & 0x10)
1448 puts (" FET switch external enable\n");
1449 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1450 if (data[20] & 0x11) {
1451 printf (" %d active registers on DIMM\n",
1452 (data[21] & 0x03) + 1);
1456 puts ("Module attributes:\n");
1460 decode_bits (data[21], decode_byte21_default, 0);
1466 decode_bits (data[22], decode_byte22_DDR2, 0);
1469 puts ("Device attributes:\n");
1470 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1471 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1472 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1473 else puts (" Upper Vcc tolerance 10%\n");
1474 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1475 else puts (" Lower Vcc tolerance 10%\n");
1476 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1477 if (data[22] & 0x04) puts (" Supports precharge all\n");
1478 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1479 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1485 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1486 print_ddr2_tcyc (data[23]);
1489 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1490 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1496 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1497 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1500 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1501 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1507 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1508 print_ddr2_tcyc (data[25]);
1511 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1512 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1518 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1519 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1522 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1523 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1529 printf ("Minimum row precharge %d.%02d ns\n",
1530 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1533 printf ("Minimum row precharge %d ns\n", data[27]);
1539 printf ("Row active to row active min %d.%02d ns\n",
1540 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1543 printf ("Row active to row active min %d ns\n", data[28]);
1549 printf ("RAS to CAS delay min %d.%02d ns\n",
1550 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1553 printf ("RAS to CAS delay min %d ns\n", data[29]);
1557 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1561 puts ("Density of each row ");
1562 decode_bits (data[31], decode_row_density_DDR2, 1);
1566 puts ("Density of each row ");
1567 decode_bits (data[31], decode_row_density_default, 1);
1574 puts ("Command and Address setup ");
1575 if (data[32] >= 0xA0) {
1576 printf ("1.%d%d ns\n",
1577 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1579 printf ("0.%d%d ns\n",
1580 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1584 printf ("Command and Address setup %c%d.%d ns\n",
1585 (data[32] & 0x80) ? '-' : '+',
1586 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1592 puts ("Command and Address hold ");
1593 if (data[33] >= 0xA0) {
1594 printf ("1.%d%d ns\n",
1595 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1597 printf ("0.%d%d ns\n",
1598 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1602 printf ("Command and Address hold %c%d.%d ns\n",
1603 (data[33] & 0x80) ? '-' : '+',
1604 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1610 printf ("Data signal input setup 0.%d%d ns\n",
1611 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1614 printf ("Data signal input setup %c%d.%d ns\n",
1615 (data[34] & 0x80) ? '-' : '+',
1616 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1622 printf ("Data signal input hold 0.%d%d ns\n",
1623 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1626 printf ("Data signal input hold %c%d.%d ns\n",
1627 (data[35] & 0x80) ? '-' : '+',
1628 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1632 puts ("Manufacturer's JEDEC ID ");
1633 for (j = 64; j <= 71; j++)
1634 printf ("%02X ", data[j]);
1636 printf ("Manufacturing Location %02X\n", data[72]);
1637 puts ("Manufacturer's Part Number ");
1638 for (j = 73; j <= 90; j++)
1639 printf ("%02X ", data[j]);
1641 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1642 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1643 puts ("Assembly Serial Number ");
1644 for (j = 95; j <= 98; j++)
1645 printf ("%02X ", data[j]);
1649 printf ("Speed rating PC%d\n",
1650 data[126] == 0x66 ? 66 : data[126]);
1658 * i2c edid {i2c_chip}
1660 #if defined(CONFIG_I2C_EDID)
1661 int do_edid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
1664 struct edid1_info edid;
1666 #ifdef CONFIG_DM_I2C
1667 struct udevice *dev;
1675 chip = simple_strtoul(argv[1], NULL, 16);
1676 #ifdef CONFIG_DM_I2C
1677 ret = i2c_get_cur_bus_chip(chip, &dev);
1679 ret = dm_i2c_read(dev, 0, (uchar *)&edid, sizeof(edid));
1681 ret = i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid));
1684 return i2c_report_err(ret, I2C_ERR_READ);
1686 if (edid_check_info(&edid)) {
1687 puts("Content isn't valid EDID.\n");
1691 edid_print_info(&edid);
1695 #endif /* CONFIG_I2C_EDID */
1697 #ifdef CONFIG_DM_I2C
1698 static void show_bus(struct udevice *bus)
1700 struct udevice *dev;
1702 printf("Bus %d:\t%s", bus->req_seq, bus->name);
1703 if (device_active(bus))
1704 printf(" (active %d)", bus->seq);
1706 for (device_find_first_child(bus, &dev);
1708 device_find_next_child(&dev)) {
1709 struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
1711 printf(" %02x: %s, offset len %x, flags %x\n",
1712 chip->chip_addr, dev->name, chip->offset_len,
1719 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1720 * @cmdtp: Command data struct pointer
1721 * @flag: Command flag
1722 * @argc: Command-line argument count
1723 * @argv: Array of command-line arguments
1725 * Returns zero always.
1727 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1728 static int do_i2c_show_bus(struct cmd_tbl *cmdtp, int flag, int argc,
1732 /* show all busses */
1733 #ifdef CONFIG_DM_I2C
1734 struct udevice *bus;
1738 ret = uclass_get(UCLASS_I2C, &uc);
1740 return CMD_RET_FAILURE;
1741 uclass_foreach_dev(bus, uc)
1746 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1747 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1748 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1751 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1752 if (i2c_bus[i].next_hop[j].chip == 0)
1754 printf("->%s@0x%2x:%d",
1755 i2c_bus[i].next_hop[j].mux.name,
1756 i2c_bus[i].next_hop[j].chip,
1757 i2c_bus[i].next_hop[j].channel);
1766 /* show specific bus */
1767 i = simple_strtoul(argv[1], NULL, 10);
1768 #ifdef CONFIG_DM_I2C
1769 struct udevice *bus;
1772 ret = uclass_get_device_by_seq(UCLASS_I2C, i, &bus);
1774 printf("Invalid bus %d: err=%d\n", i, ret);
1775 return CMD_RET_FAILURE;
1779 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1780 printf("Invalid bus %d\n", i);
1783 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1784 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1786 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1787 if (i2c_bus[i].next_hop[j].chip == 0)
1789 printf("->%s@0x%2x:%d",
1790 i2c_bus[i].next_hop[j].mux.name,
1791 i2c_bus[i].next_hop[j].chip,
1792 i2c_bus[i].next_hop[j].channel);
1804 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1805 * @cmdtp: Command data struct pointer
1806 * @flag: Command flag
1807 * @argc: Command-line argument count
1808 * @argv: Array of command-line arguments
1810 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1813 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1814 defined(CONFIG_DM_I2C)
1815 static int do_i2c_bus_num(struct cmd_tbl *cmdtp, int flag, int argc,
1822 /* querying current setting */
1823 #ifdef CONFIG_DM_I2C
1824 struct udevice *bus;
1826 if (!i2c_get_cur_bus(&bus))
1831 bus_no = i2c_get_bus_num();
1833 printf("Current bus is %d\n", bus_no);
1835 bus_no = simple_strtoul(argv[1], NULL, 10);
1836 #if defined(CONFIG_SYS_I2C)
1837 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1838 printf("Invalid bus %d\n", bus_no);
1842 printf("Setting bus to %d\n", bus_no);
1843 #ifdef CONFIG_DM_I2C
1844 ret = cmd_i2c_set_bus_num(bus_no);
1846 ret = i2c_set_bus_num(bus_no);
1849 printf("Failure changing bus number (%d)\n", ret);
1852 return ret ? CMD_RET_FAILURE : 0;
1854 #endif /* defined(CONFIG_SYS_I2C) */
1857 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1858 * @cmdtp: Command data struct pointer
1859 * @flag: Command flag
1860 * @argc: Command-line argument count
1861 * @argv: Array of command-line arguments
1863 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1866 static int do_i2c_bus_speed(struct cmd_tbl *cmdtp, int flag, int argc,
1871 #ifdef CONFIG_DM_I2C
1872 struct udevice *bus;
1874 if (i2c_get_cur_bus(&bus))
1878 #ifdef CONFIG_DM_I2C
1879 speed = dm_i2c_get_bus_speed(bus);
1881 speed = i2c_get_bus_speed();
1883 /* querying current speed */
1884 printf("Current bus speed=%d\n", speed);
1886 speed = simple_strtoul(argv[1], NULL, 10);
1887 printf("Setting bus speed to %d Hz\n", speed);
1888 #ifdef CONFIG_DM_I2C
1889 ret = dm_i2c_set_bus_speed(bus, speed);
1891 ret = i2c_set_bus_speed(speed);
1894 printf("Failure changing bus speed (%d)\n", ret);
1897 return ret ? CMD_RET_FAILURE : 0;
1901 * do_i2c_mm() - Handle the "i2c mm" command-line command
1902 * @cmdtp: Command data struct pointer
1903 * @flag: Command flag
1904 * @argc: Command-line argument count
1905 * @argv: Array of command-line arguments
1907 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1910 static int do_i2c_mm(struct cmd_tbl *cmdtp, int flag, int argc,
1913 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1917 * do_i2c_nm() - Handle the "i2c nm" command-line command
1918 * @cmdtp: Command data struct pointer
1919 * @flag: Command flag
1920 * @argc: Command-line argument count
1921 * @argv: Array of command-line arguments
1923 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1926 static int do_i2c_nm(struct cmd_tbl *cmdtp, int flag, int argc,
1929 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1933 * do_i2c_reset() - Handle the "i2c reset" command-line command
1934 * @cmdtp: Command data struct pointer
1935 * @flag: Command flag
1936 * @argc: Command-line argument count
1937 * @argv: Array of command-line arguments
1939 * Returns zero always.
1941 static int do_i2c_reset(struct cmd_tbl *cmdtp, int flag, int argc,
1944 #if defined(CONFIG_DM_I2C)
1945 struct udevice *bus;
1947 if (i2c_get_cur_bus(&bus))
1948 return CMD_RET_FAILURE;
1949 if (i2c_deblock(bus)) {
1950 printf("Error: Not supported by the driver\n");
1951 return CMD_RET_FAILURE;
1953 #elif defined(CONFIG_SYS_I2C)
1954 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1956 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1961 static struct cmd_tbl cmd_i2c_sub[] = {
1962 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1963 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1965 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1966 #if defined(CONFIG_SYS_I2C) || \
1967 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1968 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1969 #endif /* CONFIG_I2C_MULTI_BUS */
1970 #if defined(CONFIG_I2C_EDID)
1971 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1972 #endif /* CONFIG_I2C_EDID */
1973 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1974 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1975 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1976 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1977 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1978 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1979 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1980 U_BOOT_CMD_MKENT(write, 6, 0, do_i2c_write, "", ""),
1981 #ifdef CONFIG_DM_I2C
1982 U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""),
1983 U_BOOT_CMD_MKENT(olen, 2, 1, do_i2c_olen, "", ""),
1985 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1986 #if defined(CONFIG_CMD_SDRAM)
1987 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1989 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1992 static __maybe_unused void i2c_reloc(void)
1994 static int relocated;
1997 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
2003 * do_i2c() - Handle the "i2c" command-line command
2004 * @cmdtp: Command data struct pointer
2005 * @flag: Command flag
2006 * @argc: Command-line argument count
2007 * @argv: Array of command-line arguments
2009 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
2012 static int do_i2c(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
2016 #ifdef CONFIG_NEEDS_MANUAL_RELOC
2021 return CMD_RET_USAGE;
2023 /* Strip off leading 'i2c' command argument */
2027 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
2030 return c->cmd(cmdtp, flag, argc, argv);
2032 return CMD_RET_USAGE;
2035 /***************************************************/
2036 #ifdef CONFIG_SYS_LONGHELP
2037 static char i2c_help_text[] =
2038 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
2039 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
2040 "i2c " /* That's the prefix for the crc32 command below. */
2042 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
2043 #if defined(CONFIG_SYS_I2C) || \
2044 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
2045 "i2c dev [dev] - show or set current I2C bus\n"
2046 #endif /* CONFIG_I2C_MULTI_BUS */
2047 #if defined(CONFIG_I2C_EDID)
2048 "i2c edid chip - print EDID configuration information\n"
2049 #endif /* CONFIG_I2C_EDID */
2050 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2051 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2052 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2053 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2054 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2055 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2056 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2057 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2058 " to I2C; the -s option selects bulk write in a single transaction\n"
2059 #ifdef CONFIG_DM_I2C
2060 "i2c flags chip [flags] - set or get chip flags\n"
2061 "i2c olen chip [offset_length] - set or get chip offset length\n"
2063 "i2c reset - re-init the I2C Controller\n"
2064 #if defined(CONFIG_CMD_SDRAM)
2065 "i2c sdram chip - print SDRAM configuration information\n"
2067 "i2c speed [speed] - show or set I2C bus speed";