3 * Sergey Kubushyn, himself, ksi@koi8.net
5 * Changes for unified multibus/multiadapter I2C support.
8 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
10 * SPDX-License-Identifier: GPL-2.0+
14 * I2C Functions similar to the standard memory functions.
16 * There are several parameters in many of the commands that bear further
19 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
20 * Each I2C chip on the bus has a unique address. On the I2C data bus,
21 * the address is the upper seven bits and the LSB is the "read/write"
22 * bit. Note that the {i2c_chip} address specified on the command
23 * line is not shifted up: e.g. a typical EEPROM memory chip may have
24 * an I2C address of 0x50, but the data put on the bus will be 0xA0
25 * for write and 0xA1 for read. This "non shifted" address notation
26 * matches at least half of the data sheets :-/.
28 * {addr} is the address (or offset) within the chip. Small memory
29 * chips have 8 bit addresses. Large memory chips have 16 bit
30 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
31 * Many non-memory chips have multiple registers and {addr} is used
32 * as the register index. Some non-memory chips have only one register
33 * and therefore don't need any {addr} parameter.
35 * The default {addr} parameter is one byte (.1) which works well for
36 * memories and registers with 8 bits of address space.
38 * You can specify the length of the {addr} field with the optional .0,
39 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
40 * manipulating a single register device which doesn't use an address
41 * field, use "0.0" for the address and the ".0" length field will
42 * suppress the address in the I2C data stream. This also works for
43 * successive reads using the I2C auto-incrementing memory pointer.
45 * If you are manipulating a large memory with 2-byte addresses, use
46 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
48 * Then there are the unfortunate memory chips that spill the most
49 * significant 1, 2, or 3 bits of address into the chip address byte.
50 * This effectively makes one chip (logically) look like 2, 4, or
51 * 8 chips. This is handled (awkwardly) by #defining
52 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
53 * {addr} field (since .1 is the default, it doesn't actually have to
54 * be specified). Examples: given a memory chip at I2C chip address
55 * 0x50, the following would happen...
56 * i2c md 50 0 10 display 16 bytes starting at 0x000
57 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
58 * i2c md 50 100 10 display 16 bytes starting at 0x100
59 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
60 * i2c md 50 210 10 display 16 bytes starting at 0x210
61 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
62 * This is awfully ugly. It would be nice if someone would think up
63 * a better way of handling this.
65 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
69 #include <bootretry.h>
74 #include <environment.h>
78 #include <asm/byteorder.h>
79 #include <linux/compiler.h>
81 DECLARE_GLOBAL_DATA_PTR
;
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 defined(CONFIG_SYS_I2C) || 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 /* defined(CONFIG_SYS_I2C) */
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
128 #define DEFAULT_ADDR_LEN (-1)
130 #define DEFAULT_ADDR_LEN 1
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
)
154 puts("No I2C bus selected\n");
162 static int i2c_get_cur_bus_chip(uint chip_addr
, struct udevice
**devp
)
167 ret
= i2c_get_cur_bus(&bus
);
171 return i2c_get_chip(bus
, chip_addr
, 1, devp
);
177 * i2c_init_board() - Board-specific I2C bus init
179 * This function is the default no-op implementation of I2C bus
180 * initialization. This function can be overriden by board-specific
181 * implementation if needed.
184 void i2c_init_board(void)
188 /* TODO: Implement architecture-specific get/set functions */
191 * i2c_get_bus_speed() - Return I2C bus speed
193 * This function is the default implementation of function for retrieveing
194 * the current I2C bus speed in Hz.
196 * A driver implementing runtime switching of I2C bus speed must override
197 * this function to report the speed correctly. Simple or legacy drivers
198 * can use this fallback.
200 * Returns I2C bus speed in Hz.
202 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
204 * TODO: Implement architecture-specific get/set functions
205 * Should go away, if we switched completely to new multibus support
208 unsigned int i2c_get_bus_speed(void)
210 return CONFIG_SYS_I2C_SPEED
;
214 * i2c_set_bus_speed() - Configure I2C bus speed
215 * @speed: Newly set speed of the I2C bus in Hz
217 * This function is the default implementation of function for setting
218 * the I2C bus speed in Hz.
220 * A driver implementing runtime switching of I2C bus speed must override
221 * this function to report the speed correctly. Simple or legacy drivers
222 * can use this fallback.
224 * Returns zero on success, negative value on error.
227 int i2c_set_bus_speed(unsigned int speed
)
229 if (speed
!= CONFIG_SYS_I2C_SPEED
)
237 * get_alen() - Small parser helper function to get address length
239 * Returns the address length.
241 static uint
get_alen(char *arg
, int default_len
)
247 for (j
= 0; j
< 8; j
++) {
249 alen
= arg
[j
+1] - '0';
251 } else if (arg
[j
] == '\0')
262 static int i2c_report_err(int ret
, enum i2c_err_op op
)
264 printf("Error %s the chip: %d\n",
265 op
== I2C_ERR_READ
? "reading" : "writing", ret
);
267 return CMD_RET_FAILURE
;
271 * do_i2c_read() - Handle the "i2c read" command-line command
272 * @cmdtp: Command data struct pointer
273 * @flag: Command flag
274 * @argc: Command-line argument count
275 * @argv: Array of command-line arguments
277 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
281 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
283 static int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
286 uint devaddr
, length
;
295 return CMD_RET_USAGE
;
300 chip
= simple_strtoul(argv
[1], NULL
, 16);
303 * I2C data address within the chip. This can be 1 or
304 * 2 bytes long. Some day it might be 3 bytes long :-).
306 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
307 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
309 return CMD_RET_USAGE
;
312 * Length is the number of objects, not number of bytes.
314 length
= simple_strtoul(argv
[3], NULL
, 16);
317 * memaddr is the address where to store things in memory
319 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
322 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
323 if (!ret
&& alen
!= -1)
324 ret
= i2c_set_chip_offset_len(dev
, alen
);
326 ret
= dm_i2c_read(dev
, devaddr
, memaddr
, length
);
328 ret
= i2c_read(chip
, devaddr
, alen
, memaddr
, length
);
331 return i2c_report_err(ret
, I2C_ERR_READ
);
336 static int do_i2c_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
339 uint devaddr
, length
;
345 struct dm_i2c_chip
*i2c_chip
;
348 if ((argc
< 5) || (argc
> 6))
349 return cmd_usage(cmdtp
);
352 * memaddr is the address where to store things in memory
354 memaddr
= (u_char
*)simple_strtoul(argv
[1], NULL
, 16);
359 chip
= simple_strtoul(argv
[2], NULL
, 16);
362 * I2C data address within the chip. This can be 1 or
363 * 2 bytes long. Some day it might be 3 bytes long :-).
365 devaddr
= simple_strtoul(argv
[3], NULL
, 16);
366 alen
= get_alen(argv
[3], DEFAULT_ADDR_LEN
);
368 return cmd_usage(cmdtp
);
371 * Length is the number of bytes.
373 length
= simple_strtoul(argv
[4], NULL
, 16);
376 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
377 if (!ret
&& alen
!= -1)
378 ret
= i2c_set_chip_offset_len(dev
, alen
);
380 return i2c_report_err(ret
, I2C_ERR_WRITE
);
381 i2c_chip
= dev_get_parent_platdata(dev
);
383 return i2c_report_err(ret
, I2C_ERR_WRITE
);
386 if (argc
== 6 && !strcmp(argv
[5], "-s")) {
388 * Write all bytes in a single I2C transaction. If the target
389 * device is an EEPROM, it is your responsibility to not cross
390 * a page boundary. No write delay upon completion, take this
391 * into account if linking commands.
394 i2c_chip
->flags
&= ~DM_I2C_CHIP_WR_ADDRESS
;
395 ret
= dm_i2c_write(dev
, devaddr
, memaddr
, length
);
397 ret
= i2c_write(chip
, devaddr
, alen
, memaddr
, length
);
400 return i2c_report_err(ret
, I2C_ERR_WRITE
);
403 * Repeated addressing - perform <length> separate
404 * write transactions of one byte each
406 while (length
-- > 0) {
408 i2c_chip
->flags
|= DM_I2C_CHIP_WR_ADDRESS
;
409 ret
= dm_i2c_write(dev
, devaddr
++, memaddr
++, 1);
411 ret
= i2c_write(chip
, devaddr
++, alen
, memaddr
++, 1);
414 return i2c_report_err(ret
, I2C_ERR_WRITE
);
416 * No write delay with FRAM devices.
418 #if !defined(CONFIG_SYS_I2C_FRAM)
427 static int do_i2c_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
436 return CMD_RET_USAGE
;
438 chip
= simple_strtoul(argv
[1], NULL
, 16);
439 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
441 return i2c_report_err(ret
, I2C_ERR_READ
);
444 flags
= simple_strtoul(argv
[2], NULL
, 16);
445 ret
= i2c_set_chip_flags(dev
, flags
);
447 ret
= i2c_get_chip_flags(dev
, &flags
);
449 printf("%x\n", flags
);
452 return i2c_report_err(ret
, I2C_ERR_READ
);
459 * do_i2c_md() - Handle the "i2c md" command-line command
460 * @cmdtp: Command data struct pointer
461 * @flag: Command flag
462 * @argc: Command-line argument count
463 * @argv: Array of command-line arguments
465 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
469 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
471 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
476 int j
, nbytes
, linebytes
;
482 /* We use the last specified parameters, unless new ones are
485 chip
= i2c_dp_last_chip
;
486 addr
= i2c_dp_last_addr
;
487 alen
= i2c_dp_last_alen
;
488 length
= i2c_dp_last_length
;
491 return CMD_RET_USAGE
;
493 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
495 * New command specified.
501 chip
= simple_strtoul(argv
[1], NULL
, 16);
504 * I2C data address within the chip. This can be 1 or
505 * 2 bytes long. Some day it might be 3 bytes long :-).
507 addr
= simple_strtoul(argv
[2], NULL
, 16);
508 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
510 return CMD_RET_USAGE
;
513 * If another parameter, it is the length to display.
514 * Length is the number of objects, not number of bytes.
517 length
= simple_strtoul(argv
[3], NULL
, 16);
521 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
522 if (!ret
&& alen
!= -1)
523 ret
= i2c_set_chip_offset_len(dev
, alen
);
525 return i2c_report_err(ret
, I2C_ERR_READ
);
531 * We buffer all read data, so we can make sure data is read only
536 unsigned char linebuf
[DISP_LINE_LEN
];
539 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
542 ret
= dm_i2c_read(dev
, addr
, linebuf
, linebytes
);
544 ret
= i2c_read(chip
, addr
, alen
, linebuf
, linebytes
);
547 return i2c_report_err(ret
, I2C_ERR_READ
);
549 printf("%04x:", addr
);
551 for (j
=0; j
<linebytes
; j
++) {
552 printf(" %02x", *cp
++);
557 for (j
=0; j
<linebytes
; j
++) {
558 if ((*cp
< 0x20) || (*cp
> 0x7e))
567 } while (nbytes
> 0);
569 i2c_dp_last_chip
= chip
;
570 i2c_dp_last_addr
= addr
;
571 i2c_dp_last_alen
= alen
;
572 i2c_dp_last_length
= length
;
578 * do_i2c_mw() - Handle the "i2c mw" command-line command
579 * @cmdtp: Command data struct pointer
580 * @flag: Command flag
581 * @argc: Command-line argument count
582 * @argv: Array of command-line arguments
584 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
588 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
590 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
602 if ((argc
< 4) || (argc
> 5))
603 return CMD_RET_USAGE
;
606 * Chip is always specified.
608 chip
= simple_strtoul(argv
[1], NULL
, 16);
611 * Address is always specified.
613 addr
= simple_strtoul(argv
[2], NULL
, 16);
614 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
616 return CMD_RET_USAGE
;
619 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
620 if (!ret
&& alen
!= -1)
621 ret
= i2c_set_chip_offset_len(dev
, alen
);
623 return i2c_report_err(ret
, I2C_ERR_WRITE
);
626 * Value to write is always specified.
628 byte
= simple_strtoul(argv
[3], NULL
, 16);
634 count
= simple_strtoul(argv
[4], NULL
, 16);
638 while (count
-- > 0) {
640 ret
= dm_i2c_write(dev
, addr
++, &byte
, 1);
642 ret
= i2c_write(chip
, addr
++, alen
, &byte
, 1);
645 return i2c_report_err(ret
, I2C_ERR_WRITE
);
647 * Wait for the write to complete. The write can take
648 * up to 10mSec (we allow a little more time).
651 * No write delay with FRAM devices.
653 #if !defined(CONFIG_SYS_I2C_FRAM)
662 * do_i2c_crc() - Handle the "i2c crc32" command-line command
663 * @cmdtp: Command data struct pointer
664 * @flag: Command flag
665 * @argc: Command-line argument count
666 * @argv: Array of command-line arguments
668 * Calculate a CRC on memory
670 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
674 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
676 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
691 return CMD_RET_USAGE
;
694 * Chip is always specified.
696 chip
= simple_strtoul(argv
[1], NULL
, 16);
699 * Address is always specified.
701 addr
= simple_strtoul(argv
[2], NULL
, 16);
702 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
704 return CMD_RET_USAGE
;
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
= simple_strtoul(argv
[3], NULL
, 16);
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) {
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}
761 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
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
= simple_strtoul(argv
[1], NULL
, 16);
799 * Address is always specified.
801 addr
= simple_strtoul(argv
[2], NULL
, 16);
802 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
804 return CMD_RET_USAGE
;
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
);
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
= simple_strtoul(console_buffer
, &endp
, 16);
861 data
= be32_to_cpu(data
);
862 nbytes
= endp
- console_buffer
;
865 * good enough to not time out
867 bootretry_reset_cmd_timeout();
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 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
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 (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
914 #if defined(CONFIG_SYS_I2C_NOPROBES)
916 unsigned int bus
= GET_BUS_NUM
;
917 #endif /* NOPROBES */
920 struct udevice
*bus
, *dev
;
922 if (i2c_get_cur_bus(&bus
))
923 return CMD_RET_FAILURE
;
927 addr
= simple_strtol(argv
[1], 0, 16);
929 puts ("Valid chip addresses:");
930 for (j
= 0; j
< 128; j
++) {
931 if ((0 <= addr
) && (j
!= addr
))
934 #if defined(CONFIG_SYS_I2C_NOPROBES)
936 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
937 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
946 ret
= dm_i2c_probe(bus
, j
, 0, &dev
);
957 #if defined(CONFIG_SYS_I2C_NOPROBES)
958 puts ("Excluded chip addresses:");
959 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
960 if (COMPARE_BUS(bus
,k
))
961 printf(" %02X", NO_PROBE_ADDR(k
));
970 * do_i2c_loop() - Handle the "i2c loop" command-line command
971 * @cmdtp: Command data struct pointer
972 * @flag: Command flag
973 * @argc: Command-line argument count
974 * @argv: Array of command-line arguments
976 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
980 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
981 * {length} - Number of bytes to read
982 * {delay} - A DECIMAL number and defaults to 1000 uSec
984 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
998 return CMD_RET_USAGE
;
1001 * Chip is always specified.
1003 chip
= simple_strtoul(argv
[1], NULL
, 16);
1006 * Address is always specified.
1008 addr
= simple_strtoul(argv
[2], NULL
, 16);
1009 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
1011 return CMD_RET_USAGE
;
1012 #ifdef CONFIG_DM_I2C
1013 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1014 if (!ret
&& alen
!= -1)
1015 ret
= i2c_set_chip_offset_len(dev
, alen
);
1017 return i2c_report_err(ret
, I2C_ERR_WRITE
);
1021 * Length is the number of objects, not number of bytes.
1024 length
= simple_strtoul(argv
[3], NULL
, 16);
1025 if (length
> sizeof(bytes
))
1026 length
= sizeof(bytes
);
1029 * The delay time (uSec) is optional.
1033 delay
= simple_strtoul(argv
[4], NULL
, 10);
1038 #ifdef CONFIG_DM_I2C
1039 ret
= dm_i2c_read(dev
, addr
, bytes
, length
);
1041 ret
= i2c_read(chip
, addr
, alen
, bytes
, length
);
1044 i2c_report_err(ret
, I2C_ERR_READ
);
1053 * The SDRAM command is separately configured because many
1054 * (most?) embedded boards don't use SDRAM DIMMs.
1056 * FIXME: Document and probably move elsewhere!
1058 #if defined(CONFIG_CMD_SDRAM)
1059 static void print_ddr2_tcyc (u_char
const b
)
1061 printf ("%d.", (b
>> 4) & 0x0F);
1073 printf ("%d ns\n", b
& 0x0F);
1093 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
1097 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
1108 * i2c sdram {i2c_chip}
1110 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1112 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
1119 static const char *decode_CAS_DDR2
[] = {
1120 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1123 static const char *decode_CAS_default
[] = {
1124 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1127 static const char *decode_CS_WE_default
[] = {
1128 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1131 static const char *decode_byte21_default
[] = {
1133 " Redundant row address\n",
1134 " Differential clock input\n",
1135 " Registerd DQMB inputs\n",
1136 " Buffered DQMB inputs\n",
1138 " Registered address/control lines\n",
1139 " Buffered address/control lines\n"
1142 static const char *decode_byte22_DDR2
[] = {
1148 " Supports partial array self refresh\n",
1149 " Supports 50 ohm ODT\n",
1150 " Supports weak driver\n"
1153 static const char *decode_row_density_DDR2
[] = {
1154 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1155 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1158 static const char *decode_row_density_default
[] = {
1159 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1160 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1164 return CMD_RET_USAGE
;
1167 * Chip is always specified.
1169 chip
= simple_strtoul (argv
[1], NULL
, 16);
1171 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
1172 puts ("No SDRAM Serial Presence Detect found.\n");
1177 for (j
= 0; j
< 63; j
++) {
1180 if (cksum
!= data
[63]) {
1181 printf ("WARNING: Configuration data checksum failure:\n"
1182 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
1184 printf ("SPD data revision %d.%d\n",
1185 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
1186 printf ("Bytes used 0x%02X\n", data
[0]);
1187 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
1189 puts ("Memory type ");
1209 puts ("Row address bits ");
1210 if ((data
[3] & 0x00F0) == 0)
1211 printf ("%d\n", data
[3] & 0x0F);
1213 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
1215 puts ("Column address bits ");
1216 if ((data
[4] & 0x00F0) == 0)
1217 printf ("%d\n", data
[4] & 0x0F);
1219 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
1223 printf ("Number of ranks %d\n",
1224 (data
[5] & 0x07) + 1);
1227 printf ("Module rows %d\n", data
[5]);
1233 printf ("Module data width %d bits\n", data
[6]);
1236 printf ("Module data width %d bits\n",
1237 (data
[7] << 8) | data
[6]);
1241 puts ("Interface signal levels ");
1243 case 0: puts ("TTL 5.0 V\n"); break;
1244 case 1: puts ("LVTTL\n"); break;
1245 case 2: puts ("HSTL 1.5 V\n"); break;
1246 case 3: puts ("SSTL 3.3 V\n"); break;
1247 case 4: puts ("SSTL 2.5 V\n"); break;
1248 case 5: puts ("SSTL 1.8 V\n"); break;
1249 default: puts ("unknown\n"); break;
1254 printf ("SDRAM cycle time ");
1255 print_ddr2_tcyc (data
[9]);
1258 printf ("SDRAM cycle time %d.%d ns\n",
1259 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
1265 printf ("SDRAM access time 0.%d%d ns\n",
1266 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1269 printf ("SDRAM access time %d.%d ns\n",
1270 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1274 puts ("EDC configuration ");
1276 case 0: puts ("None\n"); break;
1277 case 1: puts ("Parity\n"); break;
1278 case 2: puts ("ECC\n"); break;
1279 default: puts ("unknown\n"); break;
1282 if ((data
[12] & 0x80) == 0)
1283 puts ("No self refresh, rate ");
1285 puts ("Self refresh, rate ");
1287 switch(data
[12] & 0x7F) {
1288 case 0: puts ("15.625 us\n"); break;
1289 case 1: puts ("3.9 us\n"); break;
1290 case 2: puts ("7.8 us\n"); break;
1291 case 3: puts ("31.3 us\n"); break;
1292 case 4: puts ("62.5 us\n"); break;
1293 case 5: puts ("125 us\n"); break;
1294 default: puts ("unknown\n"); break;
1299 printf ("SDRAM width (primary) %d\n", data
[13]);
1302 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
1303 if ((data
[13] & 0x80) != 0) {
1304 printf (" (second bank) %d\n",
1305 2 * (data
[13] & 0x7F));
1313 printf ("EDC width %d\n", data
[14]);
1316 if (data
[14] != 0) {
1317 printf ("EDC width %d\n",
1320 if ((data
[14] & 0x80) != 0) {
1321 printf (" (second bank) %d\n",
1322 2 * (data
[14] & 0x7F));
1329 printf ("Min clock delay, back-to-back random column addresses "
1333 puts ("Burst length(s) ");
1334 if (data
[16] & 0x80) puts (" Page");
1335 if (data
[16] & 0x08) puts (" 8");
1336 if (data
[16] & 0x04) puts (" 4");
1337 if (data
[16] & 0x02) puts (" 2");
1338 if (data
[16] & 0x01) puts (" 1");
1340 printf ("Number of banks %d\n", data
[17]);
1344 puts ("CAS latency(s) ");
1345 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1349 puts ("CAS latency(s) ");
1350 decode_bits (data
[18], decode_CAS_default
, 0);
1356 puts ("CS latency(s) ");
1357 decode_bits (data
[19], decode_CS_WE_default
, 0);
1362 puts ("WE latency(s) ");
1363 decode_bits (data
[20], decode_CS_WE_default
, 0);
1369 puts ("Module attributes:\n");
1370 if (data
[21] & 0x80)
1371 puts (" TBD (bit 7)\n");
1372 if (data
[21] & 0x40)
1373 puts (" Analysis probe installed\n");
1374 if (data
[21] & 0x20)
1375 puts (" TBD (bit 5)\n");
1376 if (data
[21] & 0x10)
1377 puts (" FET switch external enable\n");
1378 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1379 if (data
[20] & 0x11) {
1380 printf (" %d active registers on DIMM\n",
1381 (data
[21] & 0x03) + 1);
1385 puts ("Module attributes:\n");
1389 decode_bits (data
[21], decode_byte21_default
, 0);
1395 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1398 puts ("Device attributes:\n");
1399 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1400 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1401 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1402 else puts (" Upper Vcc tolerance 10%\n");
1403 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1404 else puts (" Lower Vcc tolerance 10%\n");
1405 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1406 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1407 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1408 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1414 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1415 print_ddr2_tcyc (data
[23]);
1418 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1419 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1425 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1426 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1429 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1430 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1436 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1437 print_ddr2_tcyc (data
[25]);
1440 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1441 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1447 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1448 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1451 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1452 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1458 printf ("Minimum row precharge %d.%02d ns\n",
1459 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1462 printf ("Minimum row precharge %d ns\n", data
[27]);
1468 printf ("Row active to row active min %d.%02d ns\n",
1469 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1472 printf ("Row active to row active min %d ns\n", data
[28]);
1478 printf ("RAS to CAS delay min %d.%02d ns\n",
1479 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1482 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1486 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1490 puts ("Density of each row ");
1491 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1495 puts ("Density of each row ");
1496 decode_bits (data
[31], decode_row_density_default
, 1);
1503 puts ("Command and Address setup ");
1504 if (data
[32] >= 0xA0) {
1505 printf ("1.%d%d ns\n",
1506 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1508 printf ("0.%d%d ns\n",
1509 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1513 printf ("Command and Address setup %c%d.%d ns\n",
1514 (data
[32] & 0x80) ? '-' : '+',
1515 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1521 puts ("Command and Address hold ");
1522 if (data
[33] >= 0xA0) {
1523 printf ("1.%d%d ns\n",
1524 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1526 printf ("0.%d%d ns\n",
1527 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1531 printf ("Command and Address hold %c%d.%d ns\n",
1532 (data
[33] & 0x80) ? '-' : '+',
1533 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1539 printf ("Data signal input setup 0.%d%d ns\n",
1540 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1543 printf ("Data signal input setup %c%d.%d ns\n",
1544 (data
[34] & 0x80) ? '-' : '+',
1545 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1551 printf ("Data signal input hold 0.%d%d ns\n",
1552 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1555 printf ("Data signal input hold %c%d.%d ns\n",
1556 (data
[35] & 0x80) ? '-' : '+',
1557 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1561 puts ("Manufacturer's JEDEC ID ");
1562 for (j
= 64; j
<= 71; j
++)
1563 printf ("%02X ", data
[j
]);
1565 printf ("Manufacturing Location %02X\n", data
[72]);
1566 puts ("Manufacturer's Part Number ");
1567 for (j
= 73; j
<= 90; j
++)
1568 printf ("%02X ", data
[j
]);
1570 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1571 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1572 puts ("Assembly Serial Number ");
1573 for (j
= 95; j
<= 98; j
++)
1574 printf ("%02X ", data
[j
]);
1578 printf ("Speed rating PC%d\n",
1579 data
[126] == 0x66 ? 66 : data
[126]);
1587 * i2c edid {i2c_chip}
1589 #if defined(CONFIG_I2C_EDID)
1590 int do_edid(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
1593 struct edid1_info edid
;
1595 #ifdef CONFIG_DM_I2C
1596 struct udevice
*dev
;
1604 chip
= simple_strtoul(argv
[1], NULL
, 16);
1605 #ifdef CONFIG_DM_I2C
1606 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1608 ret
= dm_i2c_read(dev
, 0, (uchar
*)&edid
, sizeof(edid
));
1610 ret
= i2c_read(chip
, 0, 1, (uchar
*)&edid
, sizeof(edid
));
1613 return i2c_report_err(ret
, I2C_ERR_READ
);
1615 if (edid_check_info(&edid
)) {
1616 puts("Content isn't valid EDID.\n");
1620 edid_print_info(&edid
);
1624 #endif /* CONFIG_I2C_EDID */
1627 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1628 * @cmdtp: Command data struct pointer
1629 * @flag: Command flag
1630 * @argc: Command-line argument count
1631 * @argv: Array of command-line arguments
1633 * Returns zero always.
1635 #if defined(CONFIG_SYS_I2C)
1636 static int do_i2c_show_bus(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1637 char * const argv
[])
1640 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1645 /* show all busses */
1646 for (i
= 0; i
< CONFIG_SYS_NUM_I2C_BUSES
; i
++) {
1647 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1648 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1649 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1650 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1652 printf("->%s@0x%2x:%d",
1653 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1654 i2c_bus
[i
].next_hop
[j
].chip
,
1655 i2c_bus
[i
].next_hop
[j
].channel
);
1661 /* show specific bus */
1662 i
= simple_strtoul(argv
[1], NULL
, 10);
1663 if (i
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1664 printf("Invalid bus %d\n", i
);
1667 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1668 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1669 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1670 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1672 printf("->%s@0x%2x:%d",
1673 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1674 i2c_bus
[i
].next_hop
[j
].chip
,
1675 i2c_bus
[i
].next_hop
[j
].channel
);
1686 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1687 * @cmdtp: Command data struct pointer
1688 * @flag: Command flag
1689 * @argc: Command-line argument count
1690 * @argv: Array of command-line arguments
1692 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1695 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1696 defined(CONFIG_DM_I2C)
1697 static int do_i2c_bus_num(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1698 char * const argv
[])
1704 /* querying current setting */
1705 #ifdef CONFIG_DM_I2C
1706 struct udevice
*bus
;
1708 if (!i2c_get_cur_bus(&bus
))
1713 bus_no
= i2c_get_bus_num();
1715 printf("Current bus is %d\n", bus_no
);
1717 bus_no
= simple_strtoul(argv
[1], NULL
, 10);
1718 #if defined(CONFIG_SYS_I2C)
1719 if (bus_no
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1720 printf("Invalid bus %d\n", bus_no
);
1724 printf("Setting bus to %d\n", bus_no
);
1725 #ifdef CONFIG_DM_I2C
1726 ret
= cmd_i2c_set_bus_num(bus_no
);
1728 ret
= i2c_set_bus_num(bus_no
);
1731 printf("Failure changing bus number (%d)\n", ret
);
1735 #endif /* defined(CONFIG_SYS_I2C) */
1738 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1739 * @cmdtp: Command data struct pointer
1740 * @flag: Command flag
1741 * @argc: Command-line argument count
1742 * @argv: Array of command-line arguments
1744 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1747 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1751 #ifdef CONFIG_DM_I2C
1752 struct udevice
*bus
;
1754 if (i2c_get_cur_bus(&bus
))
1758 #ifdef CONFIG_DM_I2C
1759 speed
= dm_i2c_get_bus_speed(bus
);
1761 speed
= i2c_get_bus_speed();
1763 /* querying current speed */
1764 printf("Current bus speed=%d\n", speed
);
1766 speed
= simple_strtoul(argv
[1], NULL
, 10);
1767 printf("Setting bus speed to %d Hz\n", speed
);
1768 #ifdef CONFIG_DM_I2C
1769 ret
= dm_i2c_set_bus_speed(bus
, speed
);
1771 ret
= i2c_set_bus_speed(speed
);
1774 printf("Failure changing bus speed (%d)\n", ret
);
1780 * do_i2c_mm() - Handle the "i2c mm" command-line command
1781 * @cmdtp: Command data struct pointer
1782 * @flag: Command flag
1783 * @argc: Command-line argument count
1784 * @argv: Array of command-line arguments
1786 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1789 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1791 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1795 * do_i2c_nm() - Handle the "i2c nm" command-line command
1796 * @cmdtp: Command data struct pointer
1797 * @flag: Command flag
1798 * @argc: Command-line argument count
1799 * @argv: Array of command-line arguments
1801 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1804 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1806 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1810 * do_i2c_reset() - Handle the "i2c reset" command-line command
1811 * @cmdtp: Command data struct pointer
1812 * @flag: Command flag
1813 * @argc: Command-line argument count
1814 * @argv: Array of command-line arguments
1816 * Returns zero always.
1818 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1820 #if defined(CONFIG_DM_I2C)
1821 struct udevice
*bus
;
1823 if (i2c_get_cur_bus(&bus
))
1824 return CMD_RET_FAILURE
;
1825 if (i2c_deblock(bus
)) {
1826 printf("Error: Not supported by the driver\n");
1827 return CMD_RET_FAILURE
;
1829 #elif defined(CONFIG_SYS_I2C)
1830 i2c_init(I2C_ADAP
->speed
, I2C_ADAP
->slaveaddr
);
1832 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1837 static cmd_tbl_t cmd_i2c_sub
[] = {
1838 #if defined(CONFIG_SYS_I2C)
1839 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_show_bus
, "", ""),
1841 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1842 #if defined(CONFIG_SYS_I2C) || \
1843 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1844 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1845 #endif /* CONFIG_I2C_MULTI_BUS */
1846 #if defined(CONFIG_I2C_EDID)
1847 U_BOOT_CMD_MKENT(edid
, 1, 1, do_edid
, "", ""),
1848 #endif /* CONFIG_I2C_EDID */
1849 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1850 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1851 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1852 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1853 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1854 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1855 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1856 U_BOOT_CMD_MKENT(write
, 6, 0, do_i2c_write
, "", ""),
1857 #ifdef CONFIG_DM_I2C
1858 U_BOOT_CMD_MKENT(flags
, 2, 1, do_i2c_flags
, "", ""),
1860 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1861 #if defined(CONFIG_CMD_SDRAM)
1862 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1864 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1867 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1868 void i2c_reloc(void) {
1869 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1874 * do_i2c() - Handle the "i2c" command-line command
1875 * @cmdtp: Command data struct pointer
1876 * @flag: Command flag
1877 * @argc: Command-line argument count
1878 * @argv: Array of command-line arguments
1880 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1883 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1888 return CMD_RET_USAGE
;
1890 /* Strip off leading 'i2c' command argument */
1894 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1897 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1899 return CMD_RET_USAGE
;
1902 /***************************************************/
1903 #ifdef CONFIG_SYS_LONGHELP
1904 static char i2c_help_text
[] =
1905 #if defined(CONFIG_SYS_I2C)
1906 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1908 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1909 #if defined(CONFIG_SYS_I2C) || \
1910 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1911 "i2c dev [dev] - show or set current I2C bus\n"
1912 #endif /* CONFIG_I2C_MULTI_BUS */
1913 #if defined(CONFIG_I2C_EDID)
1914 "i2c edid chip - print EDID configuration information\n"
1915 #endif /* CONFIG_I2C_EDID */
1916 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1917 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1918 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1919 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1920 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1921 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1922 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
1923 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
1924 " to I2C; the -s option selects bulk write in a single transaction\n"
1925 #ifdef CONFIG_DM_I2C
1926 "i2c flags chip [flags] - set or get chip flags\n"
1928 "i2c reset - re-init the I2C Controller\n"
1929 #if defined(CONFIG_CMD_SDRAM)
1930 "i2c sdram chip - print SDRAM configuration information\n"
1932 "i2c speed [speed] - show or set I2C bus speed";