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>
75 #include <environment.h>
79 #include <asm/byteorder.h>
80 #include <linux/compiler.h>
82 DECLARE_GLOBAL_DATA_PTR
;
84 /* Display values from last command.
85 * Memory modify remembered values are different from display memory.
87 static uint i2c_dp_last_chip
;
88 static uint i2c_dp_last_addr
;
89 static uint i2c_dp_last_alen
;
90 static uint i2c_dp_last_length
= 0x10;
92 static uint i2c_mm_last_chip
;
93 static uint i2c_mm_last_addr
;
94 static uint i2c_mm_last_alen
;
96 /* If only one I2C bus is present, the list of devices to ignore when
97 * the probe command is issued is represented by a 1D array of addresses.
98 * When multiple buses are present, the list is an array of bus-address
99 * pairs. The following macros take care of this */
101 #if defined(CONFIG_SYS_I2C_NOPROBES)
102 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
107 } i2c_no_probes
[] = CONFIG_SYS_I2C_NOPROBES
;
108 #define GET_BUS_NUM i2c_get_bus_num()
109 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
110 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
111 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
112 #else /* single bus */
113 static uchar i2c_no_probes
[] = CONFIG_SYS_I2C_NOPROBES
;
114 #define GET_BUS_NUM 0
115 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
116 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
117 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
118 #endif /* defined(CONFIG_SYS_I2C) */
121 #define DISP_LINE_LEN 16
124 * Default for driver model is to use the chip's existing address length.
125 * For legacy code, this is not stored, so we need to use a suitable
129 #define DEFAULT_ADDR_LEN (-1)
131 #define DEFAULT_ADDR_LEN 1
135 static struct udevice
*i2c_cur_bus
;
137 static int cmd_i2c_set_bus_num(unsigned int busnum
)
142 ret
= uclass_get_device_by_seq(UCLASS_I2C
, busnum
, &bus
);
144 debug("%s: No bus %d\n", __func__
, busnum
);
152 static int i2c_get_cur_bus(struct udevice
**busp
)
155 puts("No I2C bus selected\n");
163 static int i2c_get_cur_bus_chip(uint chip_addr
, struct udevice
**devp
)
168 ret
= i2c_get_cur_bus(&bus
);
172 return i2c_get_chip(bus
, chip_addr
, 1, devp
);
178 * i2c_init_board() - Board-specific I2C bus init
180 * This function is the default no-op implementation of I2C bus
181 * initialization. This function can be overridden by board-specific
182 * implementation if needed.
185 void i2c_init_board(void)
189 /* TODO: Implement architecture-specific get/set functions */
192 * i2c_get_bus_speed() - Return I2C bus speed
194 * This function is the default implementation of function for retrieveing
195 * the current I2C bus speed in Hz.
197 * A driver implementing runtime switching of I2C bus speed must override
198 * this function to report the speed correctly. Simple or legacy drivers
199 * can use this fallback.
201 * Returns I2C bus speed in Hz.
203 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
205 * TODO: Implement architecture-specific get/set functions
206 * Should go away, if we switched completely to new multibus support
209 unsigned int i2c_get_bus_speed(void)
211 return CONFIG_SYS_I2C_SPEED
;
215 * i2c_set_bus_speed() - Configure I2C bus speed
216 * @speed: Newly set speed of the I2C bus in Hz
218 * This function is the default implementation of function for setting
219 * the I2C bus speed in Hz.
221 * A driver implementing runtime switching of I2C bus speed must override
222 * this function to report the speed correctly. Simple or legacy drivers
223 * can use this fallback.
225 * Returns zero on success, negative value on error.
228 int i2c_set_bus_speed(unsigned int speed
)
230 if (speed
!= CONFIG_SYS_I2C_SPEED
)
238 * get_alen() - Small parser helper function to get address length
240 * Returns the address length.
242 static uint
get_alen(char *arg
, int default_len
)
248 for (j
= 0; j
< 8; j
++) {
250 alen
= arg
[j
+1] - '0';
252 } else if (arg
[j
] == '\0')
263 static int i2c_report_err(int ret
, enum i2c_err_op op
)
265 printf("Error %s the chip: %d\n",
266 op
== I2C_ERR_READ
? "reading" : "writing", ret
);
268 return CMD_RET_FAILURE
;
272 * do_i2c_read() - Handle the "i2c read" command-line command
273 * @cmdtp: Command data struct pointer
274 * @flag: Command flag
275 * @argc: Command-line argument count
276 * @argv: Array of command-line arguments
278 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
282 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
284 static int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
287 uint devaddr
, length
;
296 return CMD_RET_USAGE
;
301 chip
= simple_strtoul(argv
[1], NULL
, 16);
304 * I2C data address within the chip. This can be 1 or
305 * 2 bytes long. Some day it might be 3 bytes long :-).
307 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
308 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
310 return CMD_RET_USAGE
;
313 * Length is the number of objects, not number of bytes.
315 length
= simple_strtoul(argv
[3], NULL
, 16);
318 * memaddr is the address where to store things in memory
320 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
323 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
324 if (!ret
&& alen
!= -1)
325 ret
= i2c_set_chip_offset_len(dev
, alen
);
327 ret
= dm_i2c_read(dev
, devaddr
, memaddr
, length
);
329 ret
= i2c_read(chip
, devaddr
, alen
, memaddr
, length
);
332 return i2c_report_err(ret
, I2C_ERR_READ
);
337 static int do_i2c_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
340 uint devaddr
, length
;
346 struct dm_i2c_chip
*i2c_chip
;
349 if ((argc
< 5) || (argc
> 6))
350 return cmd_usage(cmdtp
);
353 * memaddr is the address where to store things in memory
355 memaddr
= (u_char
*)simple_strtoul(argv
[1], NULL
, 16);
360 chip
= simple_strtoul(argv
[2], NULL
, 16);
363 * I2C data address within the chip. This can be 1 or
364 * 2 bytes long. Some day it might be 3 bytes long :-).
366 devaddr
= simple_strtoul(argv
[3], NULL
, 16);
367 alen
= get_alen(argv
[3], DEFAULT_ADDR_LEN
);
369 return cmd_usage(cmdtp
);
372 * Length is the number of bytes.
374 length
= simple_strtoul(argv
[4], NULL
, 16);
377 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
378 if (!ret
&& alen
!= -1)
379 ret
= i2c_set_chip_offset_len(dev
, alen
);
381 return i2c_report_err(ret
, I2C_ERR_WRITE
);
382 i2c_chip
= dev_get_parent_platdata(dev
);
384 return i2c_report_err(ret
, I2C_ERR_WRITE
);
387 if (argc
== 6 && !strcmp(argv
[5], "-s")) {
389 * Write all bytes in a single I2C transaction. If the target
390 * device is an EEPROM, it is your responsibility to not cross
391 * a page boundary. No write delay upon completion, take this
392 * into account if linking commands.
395 i2c_chip
->flags
&= ~DM_I2C_CHIP_WR_ADDRESS
;
396 ret
= dm_i2c_write(dev
, devaddr
, memaddr
, length
);
398 ret
= i2c_write(chip
, devaddr
, alen
, memaddr
, length
);
401 return i2c_report_err(ret
, I2C_ERR_WRITE
);
404 * Repeated addressing - perform <length> separate
405 * write transactions of one byte each
407 while (length
-- > 0) {
409 i2c_chip
->flags
|= DM_I2C_CHIP_WR_ADDRESS
;
410 ret
= dm_i2c_write(dev
, devaddr
++, memaddr
++, 1);
412 ret
= i2c_write(chip
, devaddr
++, alen
, memaddr
++, 1);
415 return i2c_report_err(ret
, I2C_ERR_WRITE
);
417 * No write delay with FRAM devices.
419 #if !defined(CONFIG_SYS_I2C_FRAM)
428 static int do_i2c_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
437 return CMD_RET_USAGE
;
439 chip
= simple_strtoul(argv
[1], NULL
, 16);
440 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
442 return i2c_report_err(ret
, I2C_ERR_READ
);
445 flags
= simple_strtoul(argv
[2], NULL
, 16);
446 ret
= i2c_set_chip_flags(dev
, flags
);
448 ret
= i2c_get_chip_flags(dev
, &flags
);
450 printf("%x\n", flags
);
453 return i2c_report_err(ret
, I2C_ERR_READ
);
458 static int do_i2c_olen(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
466 return CMD_RET_USAGE
;
468 chip
= simple_strtoul(argv
[1], NULL
, 16);
469 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
471 return i2c_report_err(ret
, I2C_ERR_READ
);
474 olen
= simple_strtoul(argv
[2], NULL
, 16);
475 ret
= i2c_set_chip_offset_len(dev
, olen
);
477 ret
= i2c_get_chip_offset_len(dev
);
484 return i2c_report_err(ret
, I2C_ERR_READ
);
491 * do_i2c_md() - Handle the "i2c md" command-line command
492 * @cmdtp: Command data struct pointer
493 * @flag: Command flag
494 * @argc: Command-line argument count
495 * @argv: Array of command-line arguments
497 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
501 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
503 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
508 int j
, nbytes
, linebytes
;
514 /* We use the last specified parameters, unless new ones are
517 chip
= i2c_dp_last_chip
;
518 addr
= i2c_dp_last_addr
;
519 alen
= i2c_dp_last_alen
;
520 length
= i2c_dp_last_length
;
523 return CMD_RET_USAGE
;
525 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
527 * New command specified.
533 chip
= simple_strtoul(argv
[1], NULL
, 16);
536 * I2C data address within the chip. This can be 1 or
537 * 2 bytes long. Some day it might be 3 bytes long :-).
539 addr
= simple_strtoul(argv
[2], NULL
, 16);
540 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
542 return CMD_RET_USAGE
;
545 * If another parameter, it is the length to display.
546 * Length is the number of objects, not number of bytes.
549 length
= simple_strtoul(argv
[3], NULL
, 16);
553 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
554 if (!ret
&& alen
!= -1)
555 ret
= i2c_set_chip_offset_len(dev
, alen
);
557 return i2c_report_err(ret
, I2C_ERR_READ
);
563 * We buffer all read data, so we can make sure data is read only
568 unsigned char linebuf
[DISP_LINE_LEN
];
571 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
574 ret
= dm_i2c_read(dev
, addr
, linebuf
, linebytes
);
576 ret
= i2c_read(chip
, addr
, alen
, linebuf
, linebytes
);
579 return i2c_report_err(ret
, I2C_ERR_READ
);
581 printf("%04x:", addr
);
583 for (j
=0; j
<linebytes
; j
++) {
584 printf(" %02x", *cp
++);
589 for (j
=0; j
<linebytes
; j
++) {
590 if ((*cp
< 0x20) || (*cp
> 0x7e))
599 } while (nbytes
> 0);
601 i2c_dp_last_chip
= chip
;
602 i2c_dp_last_addr
= addr
;
603 i2c_dp_last_alen
= alen
;
604 i2c_dp_last_length
= length
;
610 * do_i2c_mw() - Handle the "i2c mw" command-line command
611 * @cmdtp: Command data struct pointer
612 * @flag: Command flag
613 * @argc: Command-line argument count
614 * @argv: Array of command-line arguments
616 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
620 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
622 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
634 if ((argc
< 4) || (argc
> 5))
635 return CMD_RET_USAGE
;
638 * Chip is always specified.
640 chip
= simple_strtoul(argv
[1], NULL
, 16);
643 * Address is always specified.
645 addr
= simple_strtoul(argv
[2], NULL
, 16);
646 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
648 return CMD_RET_USAGE
;
651 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
652 if (!ret
&& alen
!= -1)
653 ret
= i2c_set_chip_offset_len(dev
, alen
);
655 return i2c_report_err(ret
, I2C_ERR_WRITE
);
658 * Value to write is always specified.
660 byte
= simple_strtoul(argv
[3], NULL
, 16);
666 count
= simple_strtoul(argv
[4], NULL
, 16);
670 while (count
-- > 0) {
672 ret
= dm_i2c_write(dev
, addr
++, &byte
, 1);
674 ret
= i2c_write(chip
, addr
++, alen
, &byte
, 1);
677 return i2c_report_err(ret
, I2C_ERR_WRITE
);
679 * Wait for the write to complete. The write can take
680 * up to 10mSec (we allow a little more time).
683 * No write delay with FRAM devices.
685 #if !defined(CONFIG_SYS_I2C_FRAM)
694 * do_i2c_crc() - Handle the "i2c crc32" command-line command
695 * @cmdtp: Command data struct pointer
696 * @flag: Command flag
697 * @argc: Command-line argument count
698 * @argv: Array of command-line arguments
700 * Calculate a CRC on memory
702 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
706 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
708 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
723 return CMD_RET_USAGE
;
726 * Chip is always specified.
728 chip
= simple_strtoul(argv
[1], NULL
, 16);
731 * Address is always specified.
733 addr
= simple_strtoul(argv
[2], NULL
, 16);
734 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
736 return CMD_RET_USAGE
;
739 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
740 if (!ret
&& alen
!= -1)
741 ret
= i2c_set_chip_offset_len(dev
, alen
);
743 return i2c_report_err(ret
, I2C_ERR_READ
);
746 * Count is always specified
748 count
= simple_strtoul(argv
[3], NULL
, 16);
750 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
752 * CRC a byte at a time. This is going to be slooow, but hey, the
753 * memories are small and slow too so hopefully nobody notices.
757 while (count
-- > 0) {
759 ret
= dm_i2c_read(dev
, addr
, &byte
, 1);
761 ret
= i2c_read(chip
, addr
, alen
, &byte
, 1);
765 crc
= crc32 (crc
, &byte
, 1);
769 i2c_report_err(ret
, I2C_ERR_READ
);
771 printf ("%08lx\n", crc
);
777 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
778 * @cmdtp: Command data struct pointer
779 * @flag: Command flag
780 * @argc: Command-line argument count
781 * @argv: Array of command-line arguments
785 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
789 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
790 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
793 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
807 return CMD_RET_USAGE
;
809 bootretry_reset_cmd_timeout(); /* got a good command to get here */
811 * We use the last specified parameters, unless new ones are
814 chip
= i2c_mm_last_chip
;
815 addr
= i2c_mm_last_addr
;
816 alen
= i2c_mm_last_alen
;
818 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
820 * New command specified. Check for a size specification.
821 * Defaults to byte if no or incorrect specification.
823 size
= cmd_get_data_size(argv
[0], 1);
826 * Chip is always specified.
828 chip
= simple_strtoul(argv
[1], NULL
, 16);
831 * Address is always specified.
833 addr
= simple_strtoul(argv
[2], NULL
, 16);
834 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
836 return CMD_RET_USAGE
;
840 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
841 if (!ret
&& alen
!= -1)
842 ret
= i2c_set_chip_offset_len(dev
, alen
);
844 return i2c_report_err(ret
, I2C_ERR_WRITE
);
848 * Print the address, followed by value. Then accept input for
849 * the next value. A non-converted value exits.
852 printf("%08lx:", addr
);
854 ret
= dm_i2c_read(dev
, addr
, (uchar
*)&data
, size
);
856 ret
= i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
);
859 return i2c_report_err(ret
, I2C_ERR_READ
);
861 data
= cpu_to_be32(data
);
863 printf(" %02lx", (data
>> 24) & 0x000000FF);
865 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
867 printf(" %08lx", data
);
869 nbytes
= cli_readline(" ? ");
872 * <CR> pressed as only input, don't modify current
873 * location and move to next.
878 /* good enough to not time out */
879 bootretry_reset_cmd_timeout();
881 #ifdef CONFIG_BOOT_RETRY_TIME
882 else if (nbytes
== -2)
883 break; /* timed out, exit the command */
888 data
= simple_strtoul(console_buffer
, &endp
, 16);
893 data
= be32_to_cpu(data
);
894 nbytes
= endp
- console_buffer
;
897 * good enough to not time out
899 bootretry_reset_cmd_timeout();
901 ret
= dm_i2c_write(dev
, addr
, (uchar
*)&data
,
904 ret
= i2c_write(chip
, addr
, alen
,
905 (uchar
*)&data
, size
);
908 return i2c_report_err(ret
,
910 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
911 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
919 i2c_mm_last_chip
= chip
;
920 i2c_mm_last_addr
= addr
;
921 i2c_mm_last_alen
= alen
;
927 * do_i2c_probe() - Handle the "i2c probe" command-line command
928 * @cmdtp: Command data struct pointer
929 * @flag: Command flag
930 * @argc: Command-line argument count
931 * @argv: Array of command-line arguments
933 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
939 * Returns zero (success) if one or more I2C devices was found
941 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
946 #if defined(CONFIG_SYS_I2C_NOPROBES)
948 unsigned int bus
= GET_BUS_NUM
;
949 #endif /* NOPROBES */
952 struct udevice
*bus
, *dev
;
954 if (i2c_get_cur_bus(&bus
))
955 return CMD_RET_FAILURE
;
959 addr
= simple_strtol(argv
[1], 0, 16);
961 puts ("Valid chip addresses:");
962 for (j
= 0; j
< 128; j
++) {
963 if ((0 <= addr
) && (j
!= addr
))
966 #if defined(CONFIG_SYS_I2C_NOPROBES)
968 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
969 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
978 ret
= dm_i2c_probe(bus
, j
, 0, &dev
);
989 #if defined(CONFIG_SYS_I2C_NOPROBES)
990 puts ("Excluded chip addresses:");
991 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
992 if (COMPARE_BUS(bus
,k
))
993 printf(" %02X", NO_PROBE_ADDR(k
));
1002 * do_i2c_loop() - Handle the "i2c loop" command-line command
1003 * @cmdtp: Command data struct pointer
1004 * @flag: Command flag
1005 * @argc: Command-line argument count
1006 * @argv: Array of command-line arguments
1008 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1012 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1013 * {length} - Number of bytes to read
1014 * {delay} - A DECIMAL number and defaults to 1000 uSec
1016 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1025 #ifdef CONFIG_DM_I2C
1026 struct udevice
*dev
;
1030 return CMD_RET_USAGE
;
1033 * Chip is always specified.
1035 chip
= simple_strtoul(argv
[1], NULL
, 16);
1038 * Address is always specified.
1040 addr
= simple_strtoul(argv
[2], NULL
, 16);
1041 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
1043 return CMD_RET_USAGE
;
1044 #ifdef CONFIG_DM_I2C
1045 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1046 if (!ret
&& alen
!= -1)
1047 ret
= i2c_set_chip_offset_len(dev
, alen
);
1049 return i2c_report_err(ret
, I2C_ERR_WRITE
);
1053 * Length is the number of objects, not number of bytes.
1056 length
= simple_strtoul(argv
[3], NULL
, 16);
1057 if (length
> sizeof(bytes
))
1058 length
= sizeof(bytes
);
1061 * The delay time (uSec) is optional.
1065 delay
= simple_strtoul(argv
[4], NULL
, 10);
1070 #ifdef CONFIG_DM_I2C
1071 ret
= dm_i2c_read(dev
, addr
, bytes
, length
);
1073 ret
= i2c_read(chip
, addr
, alen
, bytes
, length
);
1076 i2c_report_err(ret
, I2C_ERR_READ
);
1085 * The SDRAM command is separately configured because many
1086 * (most?) embedded boards don't use SDRAM DIMMs.
1088 * FIXME: Document and probably move elsewhere!
1090 #if defined(CONFIG_CMD_SDRAM)
1091 static void print_ddr2_tcyc (u_char
const b
)
1093 printf ("%d.", (b
>> 4) & 0x0F);
1105 printf ("%d ns\n", b
& 0x0F);
1125 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
1129 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
1140 * i2c sdram {i2c_chip}
1142 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1144 enum { unknown
, EDO
, SDRAM
, DDR
, DDR2
, DDR3
, DDR4
} type
;
1151 static const char *decode_CAS_DDR2
[] = {
1152 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1155 static const char *decode_CAS_default
[] = {
1156 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1159 static const char *decode_CS_WE_default
[] = {
1160 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1163 static const char *decode_byte21_default
[] = {
1165 " Redundant row address\n",
1166 " Differential clock input\n",
1167 " Registerd DQMB inputs\n",
1168 " Buffered DQMB inputs\n",
1170 " Registered address/control lines\n",
1171 " Buffered address/control lines\n"
1174 static const char *decode_byte22_DDR2
[] = {
1180 " Supports partial array self refresh\n",
1181 " Supports 50 ohm ODT\n",
1182 " Supports weak driver\n"
1185 static const char *decode_row_density_DDR2
[] = {
1186 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1187 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1190 static const char *decode_row_density_default
[] = {
1191 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1192 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1196 return CMD_RET_USAGE
;
1199 * Chip is always specified.
1201 chip
= simple_strtoul (argv
[1], NULL
, 16);
1203 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
1204 puts ("No SDRAM Serial Presence Detect found.\n");
1209 for (j
= 0; j
< 63; j
++) {
1212 if (cksum
!= data
[63]) {
1213 printf ("WARNING: Configuration data checksum failure:\n"
1214 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
1216 printf ("SPD data revision %d.%d\n",
1217 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
1218 printf ("Bytes used 0x%02X\n", data
[0]);
1219 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
1221 puts ("Memory type ");
1253 puts ("Row address bits ");
1254 if ((data
[3] & 0x00F0) == 0)
1255 printf ("%d\n", data
[3] & 0x0F);
1257 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
1259 puts ("Column address bits ");
1260 if ((data
[4] & 0x00F0) == 0)
1261 printf ("%d\n", data
[4] & 0x0F);
1263 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
1267 printf ("Number of ranks %d\n",
1268 (data
[5] & 0x07) + 1);
1271 printf ("Module rows %d\n", data
[5]);
1277 printf ("Module data width %d bits\n", data
[6]);
1280 printf ("Module data width %d bits\n",
1281 (data
[7] << 8) | data
[6]);
1285 puts ("Interface signal levels ");
1287 case 0: puts ("TTL 5.0 V\n"); break;
1288 case 1: puts ("LVTTL\n"); break;
1289 case 2: puts ("HSTL 1.5 V\n"); break;
1290 case 3: puts ("SSTL 3.3 V\n"); break;
1291 case 4: puts ("SSTL 2.5 V\n"); break;
1292 case 5: puts ("SSTL 1.8 V\n"); break;
1293 default: puts ("unknown\n"); break;
1298 printf ("SDRAM cycle time ");
1299 print_ddr2_tcyc (data
[9]);
1302 printf ("SDRAM cycle time %d.%d ns\n",
1303 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
1309 printf ("SDRAM access time 0.%d%d ns\n",
1310 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1313 printf ("SDRAM access time %d.%d ns\n",
1314 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1318 puts ("EDC configuration ");
1320 case 0: puts ("None\n"); break;
1321 case 1: puts ("Parity\n"); break;
1322 case 2: puts ("ECC\n"); break;
1323 default: puts ("unknown\n"); break;
1326 if ((data
[12] & 0x80) == 0)
1327 puts ("No self refresh, rate ");
1329 puts ("Self refresh, rate ");
1331 switch(data
[12] & 0x7F) {
1332 case 0: puts ("15.625 us\n"); break;
1333 case 1: puts ("3.9 us\n"); break;
1334 case 2: puts ("7.8 us\n"); break;
1335 case 3: puts ("31.3 us\n"); break;
1336 case 4: puts ("62.5 us\n"); break;
1337 case 5: puts ("125 us\n"); break;
1338 default: puts ("unknown\n"); break;
1343 printf ("SDRAM width (primary) %d\n", data
[13]);
1346 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
1347 if ((data
[13] & 0x80) != 0) {
1348 printf (" (second bank) %d\n",
1349 2 * (data
[13] & 0x7F));
1357 printf ("EDC width %d\n", data
[14]);
1360 if (data
[14] != 0) {
1361 printf ("EDC width %d\n",
1364 if ((data
[14] & 0x80) != 0) {
1365 printf (" (second bank) %d\n",
1366 2 * (data
[14] & 0x7F));
1373 printf ("Min clock delay, back-to-back random column addresses "
1377 puts ("Burst length(s) ");
1378 if (data
[16] & 0x80) puts (" Page");
1379 if (data
[16] & 0x08) puts (" 8");
1380 if (data
[16] & 0x04) puts (" 4");
1381 if (data
[16] & 0x02) puts (" 2");
1382 if (data
[16] & 0x01) puts (" 1");
1384 printf ("Number of banks %d\n", data
[17]);
1388 puts ("CAS latency(s) ");
1389 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1393 puts ("CAS latency(s) ");
1394 decode_bits (data
[18], decode_CAS_default
, 0);
1400 puts ("CS latency(s) ");
1401 decode_bits (data
[19], decode_CS_WE_default
, 0);
1406 puts ("WE latency(s) ");
1407 decode_bits (data
[20], decode_CS_WE_default
, 0);
1413 puts ("Module attributes:\n");
1414 if (data
[21] & 0x80)
1415 puts (" TBD (bit 7)\n");
1416 if (data
[21] & 0x40)
1417 puts (" Analysis probe installed\n");
1418 if (data
[21] & 0x20)
1419 puts (" TBD (bit 5)\n");
1420 if (data
[21] & 0x10)
1421 puts (" FET switch external enable\n");
1422 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1423 if (data
[20] & 0x11) {
1424 printf (" %d active registers on DIMM\n",
1425 (data
[21] & 0x03) + 1);
1429 puts ("Module attributes:\n");
1433 decode_bits (data
[21], decode_byte21_default
, 0);
1439 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1442 puts ("Device attributes:\n");
1443 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1444 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1445 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1446 else puts (" Upper Vcc tolerance 10%\n");
1447 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1448 else puts (" Lower Vcc tolerance 10%\n");
1449 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1450 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1451 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1452 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1458 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1459 print_ddr2_tcyc (data
[23]);
1462 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1463 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1469 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1470 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1473 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1474 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1480 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1481 print_ddr2_tcyc (data
[25]);
1484 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1485 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1491 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1492 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1495 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1496 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1502 printf ("Minimum row precharge %d.%02d ns\n",
1503 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1506 printf ("Minimum row precharge %d ns\n", data
[27]);
1512 printf ("Row active to row active min %d.%02d ns\n",
1513 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1516 printf ("Row active to row active min %d ns\n", data
[28]);
1522 printf ("RAS to CAS delay min %d.%02d ns\n",
1523 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1526 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1530 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1534 puts ("Density of each row ");
1535 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1539 puts ("Density of each row ");
1540 decode_bits (data
[31], decode_row_density_default
, 1);
1547 puts ("Command and Address setup ");
1548 if (data
[32] >= 0xA0) {
1549 printf ("1.%d%d ns\n",
1550 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1552 printf ("0.%d%d ns\n",
1553 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1557 printf ("Command and Address setup %c%d.%d ns\n",
1558 (data
[32] & 0x80) ? '-' : '+',
1559 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1565 puts ("Command and Address hold ");
1566 if (data
[33] >= 0xA0) {
1567 printf ("1.%d%d ns\n",
1568 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1570 printf ("0.%d%d ns\n",
1571 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1575 printf ("Command and Address hold %c%d.%d ns\n",
1576 (data
[33] & 0x80) ? '-' : '+',
1577 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1583 printf ("Data signal input setup 0.%d%d ns\n",
1584 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1587 printf ("Data signal input setup %c%d.%d ns\n",
1588 (data
[34] & 0x80) ? '-' : '+',
1589 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1595 printf ("Data signal input hold 0.%d%d ns\n",
1596 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1599 printf ("Data signal input hold %c%d.%d ns\n",
1600 (data
[35] & 0x80) ? '-' : '+',
1601 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1605 puts ("Manufacturer's JEDEC ID ");
1606 for (j
= 64; j
<= 71; j
++)
1607 printf ("%02X ", data
[j
]);
1609 printf ("Manufacturing Location %02X\n", data
[72]);
1610 puts ("Manufacturer's Part Number ");
1611 for (j
= 73; j
<= 90; j
++)
1612 printf ("%02X ", data
[j
]);
1614 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1615 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1616 puts ("Assembly Serial Number ");
1617 for (j
= 95; j
<= 98; j
++)
1618 printf ("%02X ", data
[j
]);
1622 printf ("Speed rating PC%d\n",
1623 data
[126] == 0x66 ? 66 : data
[126]);
1631 * i2c edid {i2c_chip}
1633 #if defined(CONFIG_I2C_EDID)
1634 int do_edid(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
1637 struct edid1_info edid
;
1639 #ifdef CONFIG_DM_I2C
1640 struct udevice
*dev
;
1648 chip
= simple_strtoul(argv
[1], NULL
, 16);
1649 #ifdef CONFIG_DM_I2C
1650 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1652 ret
= dm_i2c_read(dev
, 0, (uchar
*)&edid
, sizeof(edid
));
1654 ret
= i2c_read(chip
, 0, 1, (uchar
*)&edid
, sizeof(edid
));
1657 return i2c_report_err(ret
, I2C_ERR_READ
);
1659 if (edid_check_info(&edid
)) {
1660 puts("Content isn't valid EDID.\n");
1664 edid_print_info(&edid
);
1668 #endif /* CONFIG_I2C_EDID */
1670 #ifdef CONFIG_DM_I2C
1671 static void show_bus(struct udevice
*bus
)
1673 struct udevice
*dev
;
1675 printf("Bus %d:\t%s", bus
->req_seq
, bus
->name
);
1676 if (device_active(bus
))
1677 printf(" (active %d)", bus
->seq
);
1679 for (device_find_first_child(bus
, &dev
);
1681 device_find_next_child(&dev
)) {
1682 struct dm_i2c_chip
*chip
= dev_get_parent_platdata(dev
);
1684 printf(" %02x: %s, offset len %x, flags %x\n",
1685 chip
->chip_addr
, dev
->name
, chip
->offset_len
,
1692 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1693 * @cmdtp: Command data struct pointer
1694 * @flag: Command flag
1695 * @argc: Command-line argument count
1696 * @argv: Array of command-line arguments
1698 * Returns zero always.
1700 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1701 static int do_i2c_show_bus(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1702 char * const argv
[])
1705 /* show all busses */
1706 #ifdef CONFIG_DM_I2C
1707 struct udevice
*bus
;
1711 ret
= uclass_get(UCLASS_I2C
, &uc
);
1713 return CMD_RET_FAILURE
;
1714 uclass_foreach_dev(bus
, uc
)
1719 for (i
= 0; i
< CONFIG_SYS_NUM_I2C_BUSES
; i
++) {
1720 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1721 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1724 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1725 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1727 printf("->%s@0x%2x:%d",
1728 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1729 i2c_bus
[i
].next_hop
[j
].chip
,
1730 i2c_bus
[i
].next_hop
[j
].channel
);
1739 /* show specific bus */
1740 i
= simple_strtoul(argv
[1], NULL
, 10);
1741 #ifdef CONFIG_DM_I2C
1742 struct udevice
*bus
;
1745 ret
= uclass_get_device_by_seq(UCLASS_I2C
, i
, &bus
);
1747 printf("Invalid bus %d: err=%d\n", i
, ret
);
1748 return CMD_RET_FAILURE
;
1752 if (i
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1753 printf("Invalid bus %d\n", i
);
1756 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1757 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1759 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1760 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1762 printf("->%s@0x%2x:%d",
1763 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1764 i2c_bus
[i
].next_hop
[j
].chip
,
1765 i2c_bus
[i
].next_hop
[j
].channel
);
1777 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1778 * @cmdtp: Command data struct pointer
1779 * @flag: Command flag
1780 * @argc: Command-line argument count
1781 * @argv: Array of command-line arguments
1783 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1786 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1787 defined(CONFIG_DM_I2C)
1788 static int do_i2c_bus_num(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1789 char * const argv
[])
1795 /* querying current setting */
1796 #ifdef CONFIG_DM_I2C
1797 struct udevice
*bus
;
1799 if (!i2c_get_cur_bus(&bus
))
1804 bus_no
= i2c_get_bus_num();
1806 printf("Current bus is %d\n", bus_no
);
1808 bus_no
= simple_strtoul(argv
[1], NULL
, 10);
1809 #if defined(CONFIG_SYS_I2C)
1810 if (bus_no
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1811 printf("Invalid bus %d\n", bus_no
);
1815 printf("Setting bus to %d\n", bus_no
);
1816 #ifdef CONFIG_DM_I2C
1817 ret
= cmd_i2c_set_bus_num(bus_no
);
1819 ret
= i2c_set_bus_num(bus_no
);
1822 printf("Failure changing bus number (%d)\n", ret
);
1825 return ret
? CMD_RET_FAILURE
: 0;
1827 #endif /* defined(CONFIG_SYS_I2C) */
1830 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1831 * @cmdtp: Command data struct pointer
1832 * @flag: Command flag
1833 * @argc: Command-line argument count
1834 * @argv: Array of command-line arguments
1836 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1839 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1843 #ifdef CONFIG_DM_I2C
1844 struct udevice
*bus
;
1846 if (i2c_get_cur_bus(&bus
))
1850 #ifdef CONFIG_DM_I2C
1851 speed
= dm_i2c_get_bus_speed(bus
);
1853 speed
= i2c_get_bus_speed();
1855 /* querying current speed */
1856 printf("Current bus speed=%d\n", speed
);
1858 speed
= simple_strtoul(argv
[1], NULL
, 10);
1859 printf("Setting bus speed to %d Hz\n", speed
);
1860 #ifdef CONFIG_DM_I2C
1861 ret
= dm_i2c_set_bus_speed(bus
, speed
);
1863 ret
= i2c_set_bus_speed(speed
);
1866 printf("Failure changing bus speed (%d)\n", ret
);
1869 return ret
? CMD_RET_FAILURE
: 0;
1873 * do_i2c_mm() - Handle the "i2c mm" 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_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1884 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1888 * do_i2c_nm() - Handle the "i2c nm" 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 on success, CMD_RET_USAGE in case of misuse and negative
1897 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1899 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1903 * do_i2c_reset() - Handle the "i2c reset" command-line command
1904 * @cmdtp: Command data struct pointer
1905 * @flag: Command flag
1906 * @argc: Command-line argument count
1907 * @argv: Array of command-line arguments
1909 * Returns zero always.
1911 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1913 #if defined(CONFIG_DM_I2C)
1914 struct udevice
*bus
;
1916 if (i2c_get_cur_bus(&bus
))
1917 return CMD_RET_FAILURE
;
1918 if (i2c_deblock(bus
)) {
1919 printf("Error: Not supported by the driver\n");
1920 return CMD_RET_FAILURE
;
1922 #elif defined(CONFIG_SYS_I2C)
1923 i2c_init(I2C_ADAP
->speed
, I2C_ADAP
->slaveaddr
);
1925 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1930 static cmd_tbl_t cmd_i2c_sub
[] = {
1931 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1932 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_show_bus
, "", ""),
1934 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1935 #if defined(CONFIG_SYS_I2C) || \
1936 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1937 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1938 #endif /* CONFIG_I2C_MULTI_BUS */
1939 #if defined(CONFIG_I2C_EDID)
1940 U_BOOT_CMD_MKENT(edid
, 1, 1, do_edid
, "", ""),
1941 #endif /* CONFIG_I2C_EDID */
1942 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1943 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1944 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1945 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1946 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1947 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1948 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1949 U_BOOT_CMD_MKENT(write
, 6, 0, do_i2c_write
, "", ""),
1950 #ifdef CONFIG_DM_I2C
1951 U_BOOT_CMD_MKENT(flags
, 2, 1, do_i2c_flags
, "", ""),
1952 U_BOOT_CMD_MKENT(olen
, 2, 1, do_i2c_olen
, "", ""),
1954 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1955 #if defined(CONFIG_CMD_SDRAM)
1956 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1958 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1961 static __maybe_unused
void i2c_reloc(void)
1963 static int relocated
;
1966 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1972 * do_i2c() - Handle the "i2c" command-line command
1973 * @cmdtp: Command data struct pointer
1974 * @flag: Command flag
1975 * @argc: Command-line argument count
1976 * @argv: Array of command-line arguments
1978 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1981 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1985 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1990 return CMD_RET_USAGE
;
1992 /* Strip off leading 'i2c' command argument */
1996 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1999 return c
->cmd(cmdtp
, flag
, argc
, argv
);
2001 return CMD_RET_USAGE
;
2004 /***************************************************/
2005 #ifdef CONFIG_SYS_LONGHELP
2006 static char i2c_help_text
[] =
2007 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
2008 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
2010 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
2011 #if defined(CONFIG_SYS_I2C) || \
2012 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
2013 "i2c dev [dev] - show or set current I2C bus\n"
2014 #endif /* CONFIG_I2C_MULTI_BUS */
2015 #if defined(CONFIG_I2C_EDID)
2016 "i2c edid chip - print EDID configuration information\n"
2017 #endif /* CONFIG_I2C_EDID */
2018 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2019 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2020 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2021 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2022 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2023 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2024 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2025 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2026 " to I2C; the -s option selects bulk write in a single transaction\n"
2027 #ifdef CONFIG_DM_I2C
2028 "i2c flags chip [flags] - set or get chip flags\n"
2029 "i2c olen chip [offset_length] - set or get chip offset length\n"
2031 "i2c reset - re-init the I2C Controller\n"
2032 #if defined(CONFIG_CMD_SDRAM)
2033 "i2c sdram chip - print SDRAM configuration information\n"
2035 "i2c speed [speed] - show or set I2C bus speed";