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
);
457 static int do_i2c_olen(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
465 return CMD_RET_USAGE
;
467 chip
= simple_strtoul(argv
[1], NULL
, 16);
468 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
470 return i2c_report_err(ret
, I2C_ERR_READ
);
473 olen
= simple_strtoul(argv
[2], NULL
, 16);
474 ret
= i2c_set_chip_offset_len(dev
, olen
);
476 ret
= i2c_get_chip_offset_len(dev
);
483 return i2c_report_err(ret
, I2C_ERR_READ
);
490 * do_i2c_md() - Handle the "i2c md" command-line command
491 * @cmdtp: Command data struct pointer
492 * @flag: Command flag
493 * @argc: Command-line argument count
494 * @argv: Array of command-line arguments
496 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
500 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
502 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
507 int j
, nbytes
, linebytes
;
513 /* We use the last specified parameters, unless new ones are
516 chip
= i2c_dp_last_chip
;
517 addr
= i2c_dp_last_addr
;
518 alen
= i2c_dp_last_alen
;
519 length
= i2c_dp_last_length
;
522 return CMD_RET_USAGE
;
524 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
526 * New command specified.
532 chip
= simple_strtoul(argv
[1], NULL
, 16);
535 * I2C data address within the chip. This can be 1 or
536 * 2 bytes long. Some day it might be 3 bytes long :-).
538 addr
= simple_strtoul(argv
[2], NULL
, 16);
539 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
541 return CMD_RET_USAGE
;
544 * If another parameter, it is the length to display.
545 * Length is the number of objects, not number of bytes.
548 length
= simple_strtoul(argv
[3], NULL
, 16);
552 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
553 if (!ret
&& alen
!= -1)
554 ret
= i2c_set_chip_offset_len(dev
, alen
);
556 return i2c_report_err(ret
, I2C_ERR_READ
);
562 * We buffer all read data, so we can make sure data is read only
567 unsigned char linebuf
[DISP_LINE_LEN
];
570 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
573 ret
= dm_i2c_read(dev
, addr
, linebuf
, linebytes
);
575 ret
= i2c_read(chip
, addr
, alen
, linebuf
, linebytes
);
578 return i2c_report_err(ret
, I2C_ERR_READ
);
580 printf("%04x:", addr
);
582 for (j
=0; j
<linebytes
; j
++) {
583 printf(" %02x", *cp
++);
588 for (j
=0; j
<linebytes
; j
++) {
589 if ((*cp
< 0x20) || (*cp
> 0x7e))
598 } while (nbytes
> 0);
600 i2c_dp_last_chip
= chip
;
601 i2c_dp_last_addr
= addr
;
602 i2c_dp_last_alen
= alen
;
603 i2c_dp_last_length
= length
;
609 * do_i2c_mw() - Handle the "i2c mw" command-line command
610 * @cmdtp: Command data struct pointer
611 * @flag: Command flag
612 * @argc: Command-line argument count
613 * @argv: Array of command-line arguments
615 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
619 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
621 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
633 if ((argc
< 4) || (argc
> 5))
634 return CMD_RET_USAGE
;
637 * Chip is always specified.
639 chip
= simple_strtoul(argv
[1], NULL
, 16);
642 * Address is always specified.
644 addr
= simple_strtoul(argv
[2], NULL
, 16);
645 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
647 return CMD_RET_USAGE
;
650 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
651 if (!ret
&& alen
!= -1)
652 ret
= i2c_set_chip_offset_len(dev
, alen
);
654 return i2c_report_err(ret
, I2C_ERR_WRITE
);
657 * Value to write is always specified.
659 byte
= simple_strtoul(argv
[3], NULL
, 16);
665 count
= simple_strtoul(argv
[4], NULL
, 16);
669 while (count
-- > 0) {
671 ret
= dm_i2c_write(dev
, addr
++, &byte
, 1);
673 ret
= i2c_write(chip
, addr
++, alen
, &byte
, 1);
676 return i2c_report_err(ret
, I2C_ERR_WRITE
);
678 * Wait for the write to complete. The write can take
679 * up to 10mSec (we allow a little more time).
682 * No write delay with FRAM devices.
684 #if !defined(CONFIG_SYS_I2C_FRAM)
693 * do_i2c_crc() - Handle the "i2c crc32" command-line command
694 * @cmdtp: Command data struct pointer
695 * @flag: Command flag
696 * @argc: Command-line argument count
697 * @argv: Array of command-line arguments
699 * Calculate a CRC on memory
701 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
705 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
707 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
722 return CMD_RET_USAGE
;
725 * Chip is always specified.
727 chip
= simple_strtoul(argv
[1], NULL
, 16);
730 * Address is always specified.
732 addr
= simple_strtoul(argv
[2], NULL
, 16);
733 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
735 return CMD_RET_USAGE
;
738 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
739 if (!ret
&& alen
!= -1)
740 ret
= i2c_set_chip_offset_len(dev
, alen
);
742 return i2c_report_err(ret
, I2C_ERR_READ
);
745 * Count is always specified
747 count
= simple_strtoul(argv
[3], NULL
, 16);
749 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
751 * CRC a byte at a time. This is going to be slooow, but hey, the
752 * memories are small and slow too so hopefully nobody notices.
756 while (count
-- > 0) {
758 ret
= dm_i2c_read(dev
, addr
, &byte
, 1);
760 ret
= i2c_read(chip
, addr
, alen
, &byte
, 1);
764 crc
= crc32 (crc
, &byte
, 1);
768 i2c_report_err(ret
, I2C_ERR_READ
);
770 printf ("%08lx\n", crc
);
776 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
777 * @cmdtp: Command data struct pointer
778 * @flag: Command flag
779 * @argc: Command-line argument count
780 * @argv: Array of command-line arguments
784 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
788 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
789 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
792 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
806 return CMD_RET_USAGE
;
808 bootretry_reset_cmd_timeout(); /* got a good command to get here */
810 * We use the last specified parameters, unless new ones are
813 chip
= i2c_mm_last_chip
;
814 addr
= i2c_mm_last_addr
;
815 alen
= i2c_mm_last_alen
;
817 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
819 * New command specified. Check for a size specification.
820 * Defaults to byte if no or incorrect specification.
822 size
= cmd_get_data_size(argv
[0], 1);
825 * Chip is always specified.
827 chip
= simple_strtoul(argv
[1], NULL
, 16);
830 * Address is always specified.
832 addr
= simple_strtoul(argv
[2], NULL
, 16);
833 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
835 return CMD_RET_USAGE
;
839 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
840 if (!ret
&& alen
!= -1)
841 ret
= i2c_set_chip_offset_len(dev
, alen
);
843 return i2c_report_err(ret
, I2C_ERR_WRITE
);
847 * Print the address, followed by value. Then accept input for
848 * the next value. A non-converted value exits.
851 printf("%08lx:", addr
);
853 ret
= dm_i2c_read(dev
, addr
, (uchar
*)&data
, size
);
855 ret
= i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
);
858 return i2c_report_err(ret
, I2C_ERR_READ
);
860 data
= cpu_to_be32(data
);
862 printf(" %02lx", (data
>> 24) & 0x000000FF);
864 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
866 printf(" %08lx", data
);
868 nbytes
= cli_readline(" ? ");
871 * <CR> pressed as only input, don't modify current
872 * location and move to next.
877 /* good enough to not time out */
878 bootretry_reset_cmd_timeout();
880 #ifdef CONFIG_BOOT_RETRY_TIME
881 else if (nbytes
== -2)
882 break; /* timed out, exit the command */
887 data
= simple_strtoul(console_buffer
, &endp
, 16);
892 data
= be32_to_cpu(data
);
893 nbytes
= endp
- console_buffer
;
896 * good enough to not time out
898 bootretry_reset_cmd_timeout();
900 ret
= dm_i2c_write(dev
, addr
, (uchar
*)&data
,
903 ret
= i2c_write(chip
, addr
, alen
,
904 (uchar
*)&data
, size
);
907 return i2c_report_err(ret
,
909 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
910 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
918 i2c_mm_last_chip
= chip
;
919 i2c_mm_last_addr
= addr
;
920 i2c_mm_last_alen
= alen
;
926 * do_i2c_probe() - Handle the "i2c probe" command-line command
927 * @cmdtp: Command data struct pointer
928 * @flag: Command flag
929 * @argc: Command-line argument count
930 * @argv: Array of command-line arguments
932 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
938 * Returns zero (success) if one or more I2C devices was found
940 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
945 #if defined(CONFIG_SYS_I2C_NOPROBES)
947 unsigned int bus
= GET_BUS_NUM
;
948 #endif /* NOPROBES */
951 struct udevice
*bus
, *dev
;
953 if (i2c_get_cur_bus(&bus
))
954 return CMD_RET_FAILURE
;
958 addr
= simple_strtol(argv
[1], 0, 16);
960 puts ("Valid chip addresses:");
961 for (j
= 0; j
< 128; j
++) {
962 if ((0 <= addr
) && (j
!= addr
))
965 #if defined(CONFIG_SYS_I2C_NOPROBES)
967 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
968 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
977 ret
= dm_i2c_probe(bus
, j
, 0, &dev
);
988 #if defined(CONFIG_SYS_I2C_NOPROBES)
989 puts ("Excluded chip addresses:");
990 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
991 if (COMPARE_BUS(bus
,k
))
992 printf(" %02X", NO_PROBE_ADDR(k
));
1001 * do_i2c_loop() - Handle the "i2c loop" command-line command
1002 * @cmdtp: Command data struct pointer
1003 * @flag: Command flag
1004 * @argc: Command-line argument count
1005 * @argv: Array of command-line arguments
1007 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1011 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1012 * {length} - Number of bytes to read
1013 * {delay} - A DECIMAL number and defaults to 1000 uSec
1015 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1024 #ifdef CONFIG_DM_I2C
1025 struct udevice
*dev
;
1029 return CMD_RET_USAGE
;
1032 * Chip is always specified.
1034 chip
= simple_strtoul(argv
[1], NULL
, 16);
1037 * Address is always specified.
1039 addr
= simple_strtoul(argv
[2], NULL
, 16);
1040 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
1042 return CMD_RET_USAGE
;
1043 #ifdef CONFIG_DM_I2C
1044 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1045 if (!ret
&& alen
!= -1)
1046 ret
= i2c_set_chip_offset_len(dev
, alen
);
1048 return i2c_report_err(ret
, I2C_ERR_WRITE
);
1052 * Length is the number of objects, not number of bytes.
1055 length
= simple_strtoul(argv
[3], NULL
, 16);
1056 if (length
> sizeof(bytes
))
1057 length
= sizeof(bytes
);
1060 * The delay time (uSec) is optional.
1064 delay
= simple_strtoul(argv
[4], NULL
, 10);
1069 #ifdef CONFIG_DM_I2C
1070 ret
= dm_i2c_read(dev
, addr
, bytes
, length
);
1072 ret
= i2c_read(chip
, addr
, alen
, bytes
, length
);
1075 i2c_report_err(ret
, I2C_ERR_READ
);
1084 * The SDRAM command is separately configured because many
1085 * (most?) embedded boards don't use SDRAM DIMMs.
1087 * FIXME: Document and probably move elsewhere!
1089 #if defined(CONFIG_CMD_SDRAM)
1090 static void print_ddr2_tcyc (u_char
const b
)
1092 printf ("%d.", (b
>> 4) & 0x0F);
1104 printf ("%d ns\n", b
& 0x0F);
1124 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
1128 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
1139 * i2c sdram {i2c_chip}
1141 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1143 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
1150 static const char *decode_CAS_DDR2
[] = {
1151 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1154 static const char *decode_CAS_default
[] = {
1155 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1158 static const char *decode_CS_WE_default
[] = {
1159 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1162 static const char *decode_byte21_default
[] = {
1164 " Redundant row address\n",
1165 " Differential clock input\n",
1166 " Registerd DQMB inputs\n",
1167 " Buffered DQMB inputs\n",
1169 " Registered address/control lines\n",
1170 " Buffered address/control lines\n"
1173 static const char *decode_byte22_DDR2
[] = {
1179 " Supports partial array self refresh\n",
1180 " Supports 50 ohm ODT\n",
1181 " Supports weak driver\n"
1184 static const char *decode_row_density_DDR2
[] = {
1185 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1186 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1189 static const char *decode_row_density_default
[] = {
1190 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1191 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1195 return CMD_RET_USAGE
;
1198 * Chip is always specified.
1200 chip
= simple_strtoul (argv
[1], NULL
, 16);
1202 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
1203 puts ("No SDRAM Serial Presence Detect found.\n");
1208 for (j
= 0; j
< 63; j
++) {
1211 if (cksum
!= data
[63]) {
1212 printf ("WARNING: Configuration data checksum failure:\n"
1213 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
1215 printf ("SPD data revision %d.%d\n",
1216 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
1217 printf ("Bytes used 0x%02X\n", data
[0]);
1218 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
1220 puts ("Memory type ");
1240 puts ("Row address bits ");
1241 if ((data
[3] & 0x00F0) == 0)
1242 printf ("%d\n", data
[3] & 0x0F);
1244 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
1246 puts ("Column address bits ");
1247 if ((data
[4] & 0x00F0) == 0)
1248 printf ("%d\n", data
[4] & 0x0F);
1250 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
1254 printf ("Number of ranks %d\n",
1255 (data
[5] & 0x07) + 1);
1258 printf ("Module rows %d\n", data
[5]);
1264 printf ("Module data width %d bits\n", data
[6]);
1267 printf ("Module data width %d bits\n",
1268 (data
[7] << 8) | data
[6]);
1272 puts ("Interface signal levels ");
1274 case 0: puts ("TTL 5.0 V\n"); break;
1275 case 1: puts ("LVTTL\n"); break;
1276 case 2: puts ("HSTL 1.5 V\n"); break;
1277 case 3: puts ("SSTL 3.3 V\n"); break;
1278 case 4: puts ("SSTL 2.5 V\n"); break;
1279 case 5: puts ("SSTL 1.8 V\n"); break;
1280 default: puts ("unknown\n"); break;
1285 printf ("SDRAM cycle time ");
1286 print_ddr2_tcyc (data
[9]);
1289 printf ("SDRAM cycle time %d.%d ns\n",
1290 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
1296 printf ("SDRAM access time 0.%d%d ns\n",
1297 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1300 printf ("SDRAM access time %d.%d ns\n",
1301 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1305 puts ("EDC configuration ");
1307 case 0: puts ("None\n"); break;
1308 case 1: puts ("Parity\n"); break;
1309 case 2: puts ("ECC\n"); break;
1310 default: puts ("unknown\n"); break;
1313 if ((data
[12] & 0x80) == 0)
1314 puts ("No self refresh, rate ");
1316 puts ("Self refresh, rate ");
1318 switch(data
[12] & 0x7F) {
1319 case 0: puts ("15.625 us\n"); break;
1320 case 1: puts ("3.9 us\n"); break;
1321 case 2: puts ("7.8 us\n"); break;
1322 case 3: puts ("31.3 us\n"); break;
1323 case 4: puts ("62.5 us\n"); break;
1324 case 5: puts ("125 us\n"); break;
1325 default: puts ("unknown\n"); break;
1330 printf ("SDRAM width (primary) %d\n", data
[13]);
1333 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
1334 if ((data
[13] & 0x80) != 0) {
1335 printf (" (second bank) %d\n",
1336 2 * (data
[13] & 0x7F));
1344 printf ("EDC width %d\n", data
[14]);
1347 if (data
[14] != 0) {
1348 printf ("EDC width %d\n",
1351 if ((data
[14] & 0x80) != 0) {
1352 printf (" (second bank) %d\n",
1353 2 * (data
[14] & 0x7F));
1360 printf ("Min clock delay, back-to-back random column addresses "
1364 puts ("Burst length(s) ");
1365 if (data
[16] & 0x80) puts (" Page");
1366 if (data
[16] & 0x08) puts (" 8");
1367 if (data
[16] & 0x04) puts (" 4");
1368 if (data
[16] & 0x02) puts (" 2");
1369 if (data
[16] & 0x01) puts (" 1");
1371 printf ("Number of banks %d\n", data
[17]);
1375 puts ("CAS latency(s) ");
1376 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1380 puts ("CAS latency(s) ");
1381 decode_bits (data
[18], decode_CAS_default
, 0);
1387 puts ("CS latency(s) ");
1388 decode_bits (data
[19], decode_CS_WE_default
, 0);
1393 puts ("WE latency(s) ");
1394 decode_bits (data
[20], decode_CS_WE_default
, 0);
1400 puts ("Module attributes:\n");
1401 if (data
[21] & 0x80)
1402 puts (" TBD (bit 7)\n");
1403 if (data
[21] & 0x40)
1404 puts (" Analysis probe installed\n");
1405 if (data
[21] & 0x20)
1406 puts (" TBD (bit 5)\n");
1407 if (data
[21] & 0x10)
1408 puts (" FET switch external enable\n");
1409 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1410 if (data
[20] & 0x11) {
1411 printf (" %d active registers on DIMM\n",
1412 (data
[21] & 0x03) + 1);
1416 puts ("Module attributes:\n");
1420 decode_bits (data
[21], decode_byte21_default
, 0);
1426 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1429 puts ("Device attributes:\n");
1430 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1431 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1432 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1433 else puts (" Upper Vcc tolerance 10%\n");
1434 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1435 else puts (" Lower Vcc tolerance 10%\n");
1436 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1437 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1438 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1439 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1445 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1446 print_ddr2_tcyc (data
[23]);
1449 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1450 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1456 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1457 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1460 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1461 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1467 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1468 print_ddr2_tcyc (data
[25]);
1471 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1472 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1478 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1479 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1482 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1483 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1489 printf ("Minimum row precharge %d.%02d ns\n",
1490 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1493 printf ("Minimum row precharge %d ns\n", data
[27]);
1499 printf ("Row active to row active min %d.%02d ns\n",
1500 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1503 printf ("Row active to row active min %d ns\n", data
[28]);
1509 printf ("RAS to CAS delay min %d.%02d ns\n",
1510 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1513 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1517 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1521 puts ("Density of each row ");
1522 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1526 puts ("Density of each row ");
1527 decode_bits (data
[31], decode_row_density_default
, 1);
1534 puts ("Command and Address setup ");
1535 if (data
[32] >= 0xA0) {
1536 printf ("1.%d%d ns\n",
1537 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1539 printf ("0.%d%d ns\n",
1540 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1544 printf ("Command and Address setup %c%d.%d ns\n",
1545 (data
[32] & 0x80) ? '-' : '+',
1546 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1552 puts ("Command and Address hold ");
1553 if (data
[33] >= 0xA0) {
1554 printf ("1.%d%d ns\n",
1555 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1557 printf ("0.%d%d ns\n",
1558 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1562 printf ("Command and Address hold %c%d.%d ns\n",
1563 (data
[33] & 0x80) ? '-' : '+',
1564 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1570 printf ("Data signal input setup 0.%d%d ns\n",
1571 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1574 printf ("Data signal input setup %c%d.%d ns\n",
1575 (data
[34] & 0x80) ? '-' : '+',
1576 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1582 printf ("Data signal input hold 0.%d%d ns\n",
1583 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1586 printf ("Data signal input hold %c%d.%d ns\n",
1587 (data
[35] & 0x80) ? '-' : '+',
1588 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1592 puts ("Manufacturer's JEDEC ID ");
1593 for (j
= 64; j
<= 71; j
++)
1594 printf ("%02X ", data
[j
]);
1596 printf ("Manufacturing Location %02X\n", data
[72]);
1597 puts ("Manufacturer's Part Number ");
1598 for (j
= 73; j
<= 90; j
++)
1599 printf ("%02X ", data
[j
]);
1601 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1602 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1603 puts ("Assembly Serial Number ");
1604 for (j
= 95; j
<= 98; j
++)
1605 printf ("%02X ", data
[j
]);
1609 printf ("Speed rating PC%d\n",
1610 data
[126] == 0x66 ? 66 : data
[126]);
1618 * i2c edid {i2c_chip}
1620 #if defined(CONFIG_I2C_EDID)
1621 int do_edid(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
1624 struct edid1_info edid
;
1626 #ifdef CONFIG_DM_I2C
1627 struct udevice
*dev
;
1635 chip
= simple_strtoul(argv
[1], NULL
, 16);
1636 #ifdef CONFIG_DM_I2C
1637 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1639 ret
= dm_i2c_read(dev
, 0, (uchar
*)&edid
, sizeof(edid
));
1641 ret
= i2c_read(chip
, 0, 1, (uchar
*)&edid
, sizeof(edid
));
1644 return i2c_report_err(ret
, I2C_ERR_READ
);
1646 if (edid_check_info(&edid
)) {
1647 puts("Content isn't valid EDID.\n");
1651 edid_print_info(&edid
);
1655 #endif /* CONFIG_I2C_EDID */
1657 #ifdef CONFIG_DM_I2C
1658 static void show_bus(struct udevice
*bus
)
1660 struct udevice
*dev
;
1662 printf("Bus %d:\t%s", bus
->req_seq
, bus
->name
);
1663 if (device_active(bus
))
1664 printf(" (active %d)", bus
->seq
);
1666 for (device_find_first_child(bus
, &dev
);
1668 device_find_next_child(&dev
)) {
1669 struct dm_i2c_chip
*chip
= dev_get_parent_platdata(dev
);
1671 printf(" %02x: %s, offset len %x, flags %x\n",
1672 chip
->chip_addr
, dev
->name
, chip
->offset_len
,
1679 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1680 * @cmdtp: Command data struct pointer
1681 * @flag: Command flag
1682 * @argc: Command-line argument count
1683 * @argv: Array of command-line arguments
1685 * Returns zero always.
1687 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1688 static int do_i2c_show_bus(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1689 char * const argv
[])
1692 /* show all busses */
1693 #ifdef CONFIG_DM_I2C
1694 struct udevice
*bus
;
1698 ret
= uclass_get(UCLASS_I2C
, &uc
);
1700 return CMD_RET_FAILURE
;
1701 uclass_foreach_dev(bus
, uc
)
1706 for (i
= 0; i
< CONFIG_SYS_NUM_I2C_BUSES
; i
++) {
1707 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1708 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1711 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1712 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1714 printf("->%s@0x%2x:%d",
1715 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1716 i2c_bus
[i
].next_hop
[j
].chip
,
1717 i2c_bus
[i
].next_hop
[j
].channel
);
1726 /* show specific bus */
1727 i
= simple_strtoul(argv
[1], NULL
, 10);
1728 #ifdef CONFIG_DM_I2C
1729 struct udevice
*bus
;
1732 ret
= uclass_get_device_by_seq(UCLASS_I2C
, i
, &bus
);
1734 printf("Invalid bus %d: err=%d\n", i
, ret
);
1735 return CMD_RET_FAILURE
;
1739 if (i
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1740 printf("Invalid bus %d\n", i
);
1743 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1744 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1746 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1747 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1749 printf("->%s@0x%2x:%d",
1750 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1751 i2c_bus
[i
].next_hop
[j
].chip
,
1752 i2c_bus
[i
].next_hop
[j
].channel
);
1764 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1765 * @cmdtp: Command data struct pointer
1766 * @flag: Command flag
1767 * @argc: Command-line argument count
1768 * @argv: Array of command-line arguments
1770 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1773 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1774 defined(CONFIG_DM_I2C)
1775 static int do_i2c_bus_num(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1776 char * const argv
[])
1782 /* querying current setting */
1783 #ifdef CONFIG_DM_I2C
1784 struct udevice
*bus
;
1786 if (!i2c_get_cur_bus(&bus
))
1791 bus_no
= i2c_get_bus_num();
1793 printf("Current bus is %d\n", bus_no
);
1795 bus_no
= simple_strtoul(argv
[1], NULL
, 10);
1796 #if defined(CONFIG_SYS_I2C)
1797 if (bus_no
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1798 printf("Invalid bus %d\n", bus_no
);
1802 printf("Setting bus to %d\n", bus_no
);
1803 #ifdef CONFIG_DM_I2C
1804 ret
= cmd_i2c_set_bus_num(bus_no
);
1806 ret
= i2c_set_bus_num(bus_no
);
1809 printf("Failure changing bus number (%d)\n", ret
);
1813 #endif /* defined(CONFIG_SYS_I2C) */
1816 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1817 * @cmdtp: Command data struct pointer
1818 * @flag: Command flag
1819 * @argc: Command-line argument count
1820 * @argv: Array of command-line arguments
1822 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1825 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1829 #ifdef CONFIG_DM_I2C
1830 struct udevice
*bus
;
1832 if (i2c_get_cur_bus(&bus
))
1836 #ifdef CONFIG_DM_I2C
1837 speed
= dm_i2c_get_bus_speed(bus
);
1839 speed
= i2c_get_bus_speed();
1841 /* querying current speed */
1842 printf("Current bus speed=%d\n", speed
);
1844 speed
= simple_strtoul(argv
[1], NULL
, 10);
1845 printf("Setting bus speed to %d Hz\n", speed
);
1846 #ifdef CONFIG_DM_I2C
1847 ret
= dm_i2c_set_bus_speed(bus
, speed
);
1849 ret
= i2c_set_bus_speed(speed
);
1852 printf("Failure changing bus speed (%d)\n", ret
);
1858 * do_i2c_mm() - Handle the "i2c mm" command-line command
1859 * @cmdtp: Command data struct pointer
1860 * @flag: Command flag
1861 * @argc: Command-line argument count
1862 * @argv: Array of command-line arguments
1864 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1867 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1869 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1873 * do_i2c_nm() - Handle the "i2c nm" command-line command
1874 * @cmdtp: Command data struct pointer
1875 * @flag: Command flag
1876 * @argc: Command-line argument count
1877 * @argv: Array of command-line arguments
1879 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1882 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1884 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1888 * do_i2c_reset() - Handle the "i2c reset" command-line command
1889 * @cmdtp: Command data struct pointer
1890 * @flag: Command flag
1891 * @argc: Command-line argument count
1892 * @argv: Array of command-line arguments
1894 * Returns zero always.
1896 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1898 #if defined(CONFIG_DM_I2C)
1899 struct udevice
*bus
;
1901 if (i2c_get_cur_bus(&bus
))
1902 return CMD_RET_FAILURE
;
1903 if (i2c_deblock(bus
)) {
1904 printf("Error: Not supported by the driver\n");
1905 return CMD_RET_FAILURE
;
1907 #elif defined(CONFIG_SYS_I2C)
1908 i2c_init(I2C_ADAP
->speed
, I2C_ADAP
->slaveaddr
);
1910 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1915 static cmd_tbl_t cmd_i2c_sub
[] = {
1916 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1917 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_show_bus
, "", ""),
1919 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1920 #if defined(CONFIG_SYS_I2C) || \
1921 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1922 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1923 #endif /* CONFIG_I2C_MULTI_BUS */
1924 #if defined(CONFIG_I2C_EDID)
1925 U_BOOT_CMD_MKENT(edid
, 1, 1, do_edid
, "", ""),
1926 #endif /* CONFIG_I2C_EDID */
1927 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1928 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1929 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1930 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1931 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1932 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1933 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1934 U_BOOT_CMD_MKENT(write
, 6, 0, do_i2c_write
, "", ""),
1935 #ifdef CONFIG_DM_I2C
1936 U_BOOT_CMD_MKENT(flags
, 2, 1, do_i2c_flags
, "", ""),
1937 U_BOOT_CMD_MKENT(olen
, 2, 1, do_i2c_olen
, "", ""),
1939 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1940 #if defined(CONFIG_CMD_SDRAM)
1941 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1943 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1946 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1947 void i2c_reloc(void) {
1948 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1953 * do_i2c() - Handle the "i2c" command-line command
1954 * @cmdtp: Command data struct pointer
1955 * @flag: Command flag
1956 * @argc: Command-line argument count
1957 * @argv: Array of command-line arguments
1959 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1962 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1967 return CMD_RET_USAGE
;
1969 /* Strip off leading 'i2c' command argument */
1973 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1976 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1978 return CMD_RET_USAGE
;
1981 /***************************************************/
1982 #ifdef CONFIG_SYS_LONGHELP
1983 static char i2c_help_text
[] =
1984 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1985 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1987 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1988 #if defined(CONFIG_SYS_I2C) || \
1989 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1990 "i2c dev [dev] - show or set current I2C bus\n"
1991 #endif /* CONFIG_I2C_MULTI_BUS */
1992 #if defined(CONFIG_I2C_EDID)
1993 "i2c edid chip - print EDID configuration information\n"
1994 #endif /* CONFIG_I2C_EDID */
1995 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1996 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1997 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1998 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1999 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2000 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2001 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2002 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2003 " to I2C; the -s option selects bulk write in a single transaction\n"
2004 #ifdef CONFIG_DM_I2C
2005 "i2c flags chip [flags] - set or get chip flags\n"
2006 "i2c olen chip [offset_length] - set or get chip offset length\n"
2008 "i2c reset - re-init the I2C Controller\n"
2009 #if defined(CONFIG_CMD_SDRAM)
2010 "i2c sdram chip - print SDRAM configuration information\n"
2012 "i2c speed [speed] - show or set I2C bus speed";