1 // SPDX-License-Identifier: GPL-2.0+
4 * Sergey Kubushyn, himself, ksi@koi8.net
6 * Changes for unified multibus/multiadapter I2C support.
9 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
13 * I2C Functions similar to the standard memory functions.
15 * There are several parameters in many of the commands that bear further
18 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
19 * Each I2C chip on the bus has a unique address. On the I2C data bus,
20 * the address is the upper seven bits and the LSB is the "read/write"
21 * bit. Note that the {i2c_chip} address specified on the command
22 * line is not shifted up: e.g. a typical EEPROM memory chip may have
23 * an I2C address of 0x50, but the data put on the bus will be 0xA0
24 * for write and 0xA1 for read. This "non shifted" address notation
25 * matches at least half of the data sheets :-/.
27 * {addr} is the address (or offset) within the chip. Small memory
28 * chips have 8 bit addresses. Large memory chips have 16 bit
29 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
30 * Many non-memory chips have multiple registers and {addr} is used
31 * as the register index. Some non-memory chips have only one register
32 * and therefore don't need any {addr} parameter.
34 * The default {addr} parameter is one byte (.1) which works well for
35 * memories and registers with 8 bits of address space.
37 * You can specify the length of the {addr} field with the optional .0,
38 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
39 * manipulating a single register device which doesn't use an address
40 * field, use "0.0" for the address and the ".0" length field will
41 * suppress the address in the I2C data stream. This also works for
42 * successive reads using the I2C auto-incrementing memory pointer.
44 * If you are manipulating a large memory with 2-byte addresses, use
45 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
47 * Then there are the unfortunate memory chips that spill the most
48 * significant 1, 2, or 3 bits of address into the chip address byte.
49 * This effectively makes one chip (logically) look like 2, 4, or
50 * 8 chips. This is handled (awkwardly) by #defining
51 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
52 * {addr} field (since .1 is the default, it doesn't actually have to
53 * be specified). Examples: given a memory chip at I2C chip address
54 * 0x50, the following would happen...
55 * i2c md 50 0 10 display 16 bytes starting at 0x000
56 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
57 * i2c md 50 100 10 display 16 bytes starting at 0x100
58 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
59 * i2c md 50 210 10 display 16 bytes starting at 0x210
60 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
61 * This is awfully ugly. It would be nice if someone would think up
62 * a better way of handling this.
64 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
68 #include <bootretry.h>
74 #include <environment.h>
78 #include <asm/byteorder.h>
79 #include <linux/compiler.h>
81 /* Display values from last command.
82 * Memory modify remembered values are different from display memory.
84 static uint i2c_dp_last_chip
;
85 static uint i2c_dp_last_addr
;
86 static uint i2c_dp_last_alen
;
87 static uint i2c_dp_last_length
= 0x10;
89 static uint i2c_mm_last_chip
;
90 static uint i2c_mm_last_addr
;
91 static uint i2c_mm_last_alen
;
93 /* If only one I2C bus is present, the list of devices to ignore when
94 * the probe command is issued is represented by a 1D array of addresses.
95 * When multiple buses are present, the list is an array of bus-address
96 * pairs. The following macros take care of this */
98 #if defined(CONFIG_SYS_I2C_NOPROBES)
99 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
104 } i2c_no_probes
[] = CONFIG_SYS_I2C_NOPROBES
;
105 #define GET_BUS_NUM i2c_get_bus_num()
106 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
107 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
108 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
109 #else /* single bus */
110 static uchar i2c_no_probes
[] = CONFIG_SYS_I2C_NOPROBES
;
111 #define GET_BUS_NUM 0
112 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
113 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
114 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
115 #endif /* defined(CONFIG_SYS_I2C) */
118 #define DISP_LINE_LEN 16
121 * Default for driver model is to use the chip's existing address length.
122 * For legacy code, this is not stored, so we need to use a suitable
126 #define DEFAULT_ADDR_LEN (-1)
128 #define DEFAULT_ADDR_LEN 1
132 static struct udevice
*i2c_cur_bus
;
134 static int cmd_i2c_set_bus_num(unsigned int busnum
)
139 ret
= uclass_get_device_by_seq(UCLASS_I2C
, busnum
, &bus
);
141 debug("%s: No bus %d\n", __func__
, busnum
);
149 static int i2c_get_cur_bus(struct udevice
**busp
)
151 #ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
153 if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER
)) {
154 printf("Default I2C bus %d not found\n",
155 CONFIG_I2C_DEFAULT_BUS_NUMBER
);
162 puts("No I2C bus selected\n");
170 static int i2c_get_cur_bus_chip(uint chip_addr
, struct udevice
**devp
)
175 ret
= i2c_get_cur_bus(&bus
);
179 return i2c_get_chip(bus
, chip_addr
, 1, devp
);
185 * i2c_init_board() - Board-specific I2C bus init
187 * This function is the default no-op implementation of I2C bus
188 * initialization. This function can be overridden by board-specific
189 * implementation if needed.
192 void i2c_init_board(void)
196 /* TODO: Implement architecture-specific get/set functions */
199 * i2c_get_bus_speed() - Return I2C bus speed
201 * This function is the default implementation of function for retrieveing
202 * the current I2C bus speed in Hz.
204 * A driver implementing runtime switching of I2C bus speed must override
205 * this function to report the speed correctly. Simple or legacy drivers
206 * can use this fallback.
208 * Returns I2C bus speed in Hz.
210 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
212 * TODO: Implement architecture-specific get/set functions
213 * Should go away, if we switched completely to new multibus support
216 unsigned int i2c_get_bus_speed(void)
218 return CONFIG_SYS_I2C_SPEED
;
222 * i2c_set_bus_speed() - Configure I2C bus speed
223 * @speed: Newly set speed of the I2C bus in Hz
225 * This function is the default implementation of function for setting
226 * the I2C bus speed in Hz.
228 * A driver implementing runtime switching of I2C bus speed must override
229 * this function to report the speed correctly. Simple or legacy drivers
230 * can use this fallback.
232 * Returns zero on success, negative value on error.
235 int i2c_set_bus_speed(unsigned int speed
)
237 if (speed
!= CONFIG_SYS_I2C_SPEED
)
245 * get_alen() - Small parser helper function to get address length
247 * Returns the address length.
249 static uint
get_alen(char *arg
, int default_len
)
255 for (j
= 0; j
< 8; j
++) {
257 alen
= arg
[j
+1] - '0';
259 } else if (arg
[j
] == '\0')
270 static int i2c_report_err(int ret
, enum i2c_err_op op
)
272 printf("Error %s the chip: %d\n",
273 op
== I2C_ERR_READ
? "reading" : "writing", ret
);
275 return CMD_RET_FAILURE
;
279 * do_i2c_read() - Handle the "i2c read" command-line command
280 * @cmdtp: Command data struct pointer
281 * @flag: Command flag
282 * @argc: Command-line argument count
283 * @argv: Array of command-line arguments
285 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
289 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
291 static int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
294 uint devaddr
, length
;
303 return CMD_RET_USAGE
;
308 chip
= simple_strtoul(argv
[1], NULL
, 16);
311 * I2C data address within the chip. This can be 1 or
312 * 2 bytes long. Some day it might be 3 bytes long :-).
314 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
315 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
317 return CMD_RET_USAGE
;
320 * Length is the number of objects, not number of bytes.
322 length
= simple_strtoul(argv
[3], NULL
, 16);
325 * memaddr is the address where to store things in memory
327 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
330 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
331 if (!ret
&& alen
!= -1)
332 ret
= i2c_set_chip_offset_len(dev
, alen
);
334 ret
= dm_i2c_read(dev
, devaddr
, memaddr
, length
);
336 ret
= i2c_read(chip
, devaddr
, alen
, memaddr
, length
);
339 return i2c_report_err(ret
, I2C_ERR_READ
);
344 static int do_i2c_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
347 uint devaddr
, length
;
353 struct dm_i2c_chip
*i2c_chip
;
356 if ((argc
< 5) || (argc
> 6))
357 return cmd_usage(cmdtp
);
360 * memaddr is the address where to store things in memory
362 memaddr
= (u_char
*)simple_strtoul(argv
[1], NULL
, 16);
367 chip
= simple_strtoul(argv
[2], NULL
, 16);
370 * I2C data address within the chip. This can be 1 or
371 * 2 bytes long. Some day it might be 3 bytes long :-).
373 devaddr
= simple_strtoul(argv
[3], NULL
, 16);
374 alen
= get_alen(argv
[3], DEFAULT_ADDR_LEN
);
376 return cmd_usage(cmdtp
);
379 * Length is the number of bytes.
381 length
= simple_strtoul(argv
[4], NULL
, 16);
384 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
385 if (!ret
&& alen
!= -1)
386 ret
= i2c_set_chip_offset_len(dev
, alen
);
388 return i2c_report_err(ret
, I2C_ERR_WRITE
);
389 i2c_chip
= dev_get_parent_platdata(dev
);
391 return i2c_report_err(ret
, I2C_ERR_WRITE
);
394 if (argc
== 6 && !strcmp(argv
[5], "-s")) {
396 * Write all bytes in a single I2C transaction. If the target
397 * device is an EEPROM, it is your responsibility to not cross
398 * a page boundary. No write delay upon completion, take this
399 * into account if linking commands.
402 i2c_chip
->flags
&= ~DM_I2C_CHIP_WR_ADDRESS
;
403 ret
= dm_i2c_write(dev
, devaddr
, memaddr
, length
);
405 ret
= i2c_write(chip
, devaddr
, alen
, memaddr
, length
);
408 return i2c_report_err(ret
, I2C_ERR_WRITE
);
411 * Repeated addressing - perform <length> separate
412 * write transactions of one byte each
414 while (length
-- > 0) {
416 i2c_chip
->flags
|= DM_I2C_CHIP_WR_ADDRESS
;
417 ret
= dm_i2c_write(dev
, devaddr
++, memaddr
++, 1);
419 ret
= i2c_write(chip
, devaddr
++, alen
, memaddr
++, 1);
422 return i2c_report_err(ret
, I2C_ERR_WRITE
);
424 * No write delay with FRAM devices.
426 #if !defined(CONFIG_SYS_I2C_FRAM)
435 static int do_i2c_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
444 return CMD_RET_USAGE
;
446 chip
= simple_strtoul(argv
[1], NULL
, 16);
447 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
449 return i2c_report_err(ret
, I2C_ERR_READ
);
452 flags
= simple_strtoul(argv
[2], NULL
, 16);
453 ret
= i2c_set_chip_flags(dev
, flags
);
455 ret
= i2c_get_chip_flags(dev
, &flags
);
457 printf("%x\n", flags
);
460 return i2c_report_err(ret
, I2C_ERR_READ
);
465 static int do_i2c_olen(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
473 return CMD_RET_USAGE
;
475 chip
= simple_strtoul(argv
[1], NULL
, 16);
476 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
478 return i2c_report_err(ret
, I2C_ERR_READ
);
481 olen
= simple_strtoul(argv
[2], NULL
, 16);
482 ret
= i2c_set_chip_offset_len(dev
, olen
);
484 ret
= i2c_get_chip_offset_len(dev
);
491 return i2c_report_err(ret
, I2C_ERR_READ
);
498 * do_i2c_md() - Handle the "i2c md" command-line command
499 * @cmdtp: Command data struct pointer
500 * @flag: Command flag
501 * @argc: Command-line argument count
502 * @argv: Array of command-line arguments
504 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
508 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
510 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
515 int j
, nbytes
, linebytes
;
521 /* We use the last specified parameters, unless new ones are
524 chip
= i2c_dp_last_chip
;
525 addr
= i2c_dp_last_addr
;
526 alen
= i2c_dp_last_alen
;
527 length
= i2c_dp_last_length
;
530 return CMD_RET_USAGE
;
532 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
534 * New command specified.
540 chip
= simple_strtoul(argv
[1], NULL
, 16);
543 * I2C data address within the chip. This can be 1 or
544 * 2 bytes long. Some day it might be 3 bytes long :-).
546 addr
= simple_strtoul(argv
[2], NULL
, 16);
547 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
549 return CMD_RET_USAGE
;
552 * If another parameter, it is the length to display.
553 * Length is the number of objects, not number of bytes.
556 length
= simple_strtoul(argv
[3], NULL
, 16);
560 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
561 if (!ret
&& alen
!= -1)
562 ret
= i2c_set_chip_offset_len(dev
, alen
);
564 return i2c_report_err(ret
, I2C_ERR_READ
);
570 * We buffer all read data, so we can make sure data is read only
575 unsigned char linebuf
[DISP_LINE_LEN
];
578 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
581 ret
= dm_i2c_read(dev
, addr
, linebuf
, linebytes
);
583 ret
= i2c_read(chip
, addr
, alen
, linebuf
, linebytes
);
586 return i2c_report_err(ret
, I2C_ERR_READ
);
588 printf("%04x:", addr
);
590 for (j
=0; j
<linebytes
; j
++) {
591 printf(" %02x", *cp
++);
596 for (j
=0; j
<linebytes
; j
++) {
597 if ((*cp
< 0x20) || (*cp
> 0x7e))
606 } while (nbytes
> 0);
608 i2c_dp_last_chip
= chip
;
609 i2c_dp_last_addr
= addr
;
610 i2c_dp_last_alen
= alen
;
611 i2c_dp_last_length
= length
;
617 * do_i2c_mw() - Handle the "i2c mw" command-line command
618 * @cmdtp: Command data struct pointer
619 * @flag: Command flag
620 * @argc: Command-line argument count
621 * @argv: Array of command-line arguments
623 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
627 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
629 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
641 if ((argc
< 4) || (argc
> 5))
642 return CMD_RET_USAGE
;
645 * Chip is always specified.
647 chip
= simple_strtoul(argv
[1], NULL
, 16);
650 * Address is always specified.
652 addr
= simple_strtoul(argv
[2], NULL
, 16);
653 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
655 return CMD_RET_USAGE
;
658 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
659 if (!ret
&& alen
!= -1)
660 ret
= i2c_set_chip_offset_len(dev
, alen
);
662 return i2c_report_err(ret
, I2C_ERR_WRITE
);
665 * Value to write is always specified.
667 byte
= simple_strtoul(argv
[3], NULL
, 16);
673 count
= simple_strtoul(argv
[4], NULL
, 16);
677 while (count
-- > 0) {
679 ret
= dm_i2c_write(dev
, addr
++, &byte
, 1);
681 ret
= i2c_write(chip
, addr
++, alen
, &byte
, 1);
684 return i2c_report_err(ret
, I2C_ERR_WRITE
);
686 * Wait for the write to complete. The write can take
687 * up to 10mSec (we allow a little more time).
690 * No write delay with FRAM devices.
692 #if !defined(CONFIG_SYS_I2C_FRAM)
701 * do_i2c_crc() - Handle the "i2c crc32" command-line command
702 * @cmdtp: Command data struct pointer
703 * @flag: Command flag
704 * @argc: Command-line argument count
705 * @argv: Array of command-line arguments
707 * Calculate a CRC on memory
709 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
713 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
715 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
730 return CMD_RET_USAGE
;
733 * Chip is always specified.
735 chip
= simple_strtoul(argv
[1], NULL
, 16);
738 * Address is always specified.
740 addr
= simple_strtoul(argv
[2], NULL
, 16);
741 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
743 return CMD_RET_USAGE
;
746 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
747 if (!ret
&& alen
!= -1)
748 ret
= i2c_set_chip_offset_len(dev
, alen
);
750 return i2c_report_err(ret
, I2C_ERR_READ
);
753 * Count is always specified
755 count
= simple_strtoul(argv
[3], NULL
, 16);
757 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
759 * CRC a byte at a time. This is going to be slooow, but hey, the
760 * memories are small and slow too so hopefully nobody notices.
764 while (count
-- > 0) {
766 ret
= dm_i2c_read(dev
, addr
, &byte
, 1);
768 ret
= i2c_read(chip
, addr
, alen
, &byte
, 1);
772 crc
= crc32 (crc
, &byte
, 1);
776 i2c_report_err(ret
, I2C_ERR_READ
);
778 printf ("%08lx\n", crc
);
784 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
785 * @cmdtp: Command data struct pointer
786 * @flag: Command flag
787 * @argc: Command-line argument count
788 * @argv: Array of command-line arguments
792 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
796 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
797 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
800 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
814 return CMD_RET_USAGE
;
816 bootretry_reset_cmd_timeout(); /* got a good command to get here */
818 * We use the last specified parameters, unless new ones are
821 chip
= i2c_mm_last_chip
;
822 addr
= i2c_mm_last_addr
;
823 alen
= i2c_mm_last_alen
;
825 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
827 * New command specified. Check for a size specification.
828 * Defaults to byte if no or incorrect specification.
830 size
= cmd_get_data_size(argv
[0], 1);
833 * Chip is always specified.
835 chip
= simple_strtoul(argv
[1], NULL
, 16);
838 * Address is always specified.
840 addr
= simple_strtoul(argv
[2], NULL
, 16);
841 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
843 return CMD_RET_USAGE
;
847 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
848 if (!ret
&& alen
!= -1)
849 ret
= i2c_set_chip_offset_len(dev
, alen
);
851 return i2c_report_err(ret
, I2C_ERR_WRITE
);
855 * Print the address, followed by value. Then accept input for
856 * the next value. A non-converted value exits.
859 printf("%08lx:", addr
);
861 ret
= dm_i2c_read(dev
, addr
, (uchar
*)&data
, size
);
863 ret
= i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
);
866 return i2c_report_err(ret
, I2C_ERR_READ
);
868 data
= cpu_to_be32(data
);
870 printf(" %02lx", (data
>> 24) & 0x000000FF);
872 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
874 printf(" %08lx", data
);
876 nbytes
= cli_readline(" ? ");
879 * <CR> pressed as only input, don't modify current
880 * location and move to next.
885 /* good enough to not time out */
886 bootretry_reset_cmd_timeout();
888 #ifdef CONFIG_BOOT_RETRY_TIME
889 else if (nbytes
== -2)
890 break; /* timed out, exit the command */
895 data
= simple_strtoul(console_buffer
, &endp
, 16);
900 data
= be32_to_cpu(data
);
901 nbytes
= endp
- console_buffer
;
904 * good enough to not time out
906 bootretry_reset_cmd_timeout();
908 ret
= dm_i2c_write(dev
, addr
, (uchar
*)&data
,
911 ret
= i2c_write(chip
, addr
, alen
,
912 (uchar
*)&data
, size
);
915 return i2c_report_err(ret
,
917 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
918 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
926 i2c_mm_last_chip
= chip
;
927 i2c_mm_last_addr
= addr
;
928 i2c_mm_last_alen
= alen
;
934 * do_i2c_probe() - Handle the "i2c probe" command-line command
935 * @cmdtp: Command data struct pointer
936 * @flag: Command flag
937 * @argc: Command-line argument count
938 * @argv: Array of command-line arguments
940 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
946 * Returns zero (success) if one or more I2C devices was found
948 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
953 #if defined(CONFIG_SYS_I2C_NOPROBES)
955 unsigned int bus
= GET_BUS_NUM
;
956 #endif /* NOPROBES */
959 struct udevice
*bus
, *dev
;
961 if (i2c_get_cur_bus(&bus
))
962 return CMD_RET_FAILURE
;
966 addr
= simple_strtol(argv
[1], 0, 16);
968 puts ("Valid chip addresses:");
969 for (j
= 0; j
< 128; j
++) {
970 if ((0 <= addr
) && (j
!= addr
))
973 #if defined(CONFIG_SYS_I2C_NOPROBES)
975 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
976 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
985 ret
= dm_i2c_probe(bus
, j
, 0, &dev
);
996 #if defined(CONFIG_SYS_I2C_NOPROBES)
997 puts ("Excluded chip addresses:");
998 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
999 if (COMPARE_BUS(bus
,k
))
1000 printf(" %02X", NO_PROBE_ADDR(k
));
1005 return (0 == found
);
1009 * do_i2c_loop() - Handle the "i2c loop" command-line command
1010 * @cmdtp: Command data struct pointer
1011 * @flag: Command flag
1012 * @argc: Command-line argument count
1013 * @argv: Array of command-line arguments
1015 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1019 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1020 * {length} - Number of bytes to read
1021 * {delay} - A DECIMAL number and defaults to 1000 uSec
1023 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1032 #ifdef CONFIG_DM_I2C
1033 struct udevice
*dev
;
1037 return CMD_RET_USAGE
;
1040 * Chip is always specified.
1042 chip
= simple_strtoul(argv
[1], NULL
, 16);
1045 * Address is always specified.
1047 addr
= simple_strtoul(argv
[2], NULL
, 16);
1048 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
1050 return CMD_RET_USAGE
;
1051 #ifdef CONFIG_DM_I2C
1052 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1053 if (!ret
&& alen
!= -1)
1054 ret
= i2c_set_chip_offset_len(dev
, alen
);
1056 return i2c_report_err(ret
, I2C_ERR_WRITE
);
1060 * Length is the number of objects, not number of bytes.
1063 length
= simple_strtoul(argv
[3], NULL
, 16);
1064 if (length
> sizeof(bytes
))
1065 length
= sizeof(bytes
);
1068 * The delay time (uSec) is optional.
1072 delay
= simple_strtoul(argv
[4], NULL
, 10);
1077 #ifdef CONFIG_DM_I2C
1078 ret
= dm_i2c_read(dev
, addr
, bytes
, length
);
1080 ret
= i2c_read(chip
, addr
, alen
, bytes
, length
);
1083 i2c_report_err(ret
, I2C_ERR_READ
);
1092 * The SDRAM command is separately configured because many
1093 * (most?) embedded boards don't use SDRAM DIMMs.
1095 * FIXME: Document and probably move elsewhere!
1097 #if defined(CONFIG_CMD_SDRAM)
1098 static void print_ddr2_tcyc (u_char
const b
)
1100 printf ("%d.", (b
>> 4) & 0x0F);
1112 printf ("%d ns\n", b
& 0x0F);
1132 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
1136 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
1147 * i2c sdram {i2c_chip}
1149 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1151 enum { unknown
, EDO
, SDRAM
, DDR
, DDR2
, DDR3
, DDR4
} type
;
1157 #ifdef CONFIG_DM_I2C
1158 struct udevice
*dev
;
1161 static const char *decode_CAS_DDR2
[] = {
1162 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
1165 static const char *decode_CAS_default
[] = {
1166 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
1169 static const char *decode_CS_WE_default
[] = {
1170 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
1173 static const char *decode_byte21_default
[] = {
1175 " Redundant row address\n",
1176 " Differential clock input\n",
1177 " Registerd DQMB inputs\n",
1178 " Buffered DQMB inputs\n",
1180 " Registered address/control lines\n",
1181 " Buffered address/control lines\n"
1184 static const char *decode_byte22_DDR2
[] = {
1190 " Supports partial array self refresh\n",
1191 " Supports 50 ohm ODT\n",
1192 " Supports weak driver\n"
1195 static const char *decode_row_density_DDR2
[] = {
1196 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
1197 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
1200 static const char *decode_row_density_default
[] = {
1201 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
1202 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
1206 return CMD_RET_USAGE
;
1209 * Chip is always specified.
1211 chip
= simple_strtoul (argv
[1], NULL
, 16);
1213 #ifdef CONFIG_DM_I2C
1214 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1216 ret
= dm_i2c_read(dev
, 0, data
, sizeof(data
));
1218 ret
= i2c_read(chip
, 0, 1, data
, sizeof(data
));
1221 puts ("No SDRAM Serial Presence Detect found.\n");
1226 for (j
= 0; j
< 63; j
++) {
1229 if (cksum
!= data
[63]) {
1230 printf ("WARNING: Configuration data checksum failure:\n"
1231 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
1233 printf ("SPD data revision %d.%d\n",
1234 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
1235 printf ("Bytes used 0x%02X\n", data
[0]);
1236 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
1238 puts ("Memory type ");
1270 puts ("Row address bits ");
1271 if ((data
[3] & 0x00F0) == 0)
1272 printf ("%d\n", data
[3] & 0x0F);
1274 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
1276 puts ("Column address bits ");
1277 if ((data
[4] & 0x00F0) == 0)
1278 printf ("%d\n", data
[4] & 0x0F);
1280 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
1284 printf ("Number of ranks %d\n",
1285 (data
[5] & 0x07) + 1);
1288 printf ("Module rows %d\n", data
[5]);
1294 printf ("Module data width %d bits\n", data
[6]);
1297 printf ("Module data width %d bits\n",
1298 (data
[7] << 8) | data
[6]);
1302 puts ("Interface signal levels ");
1304 case 0: puts ("TTL 5.0 V\n"); break;
1305 case 1: puts ("LVTTL\n"); break;
1306 case 2: puts ("HSTL 1.5 V\n"); break;
1307 case 3: puts ("SSTL 3.3 V\n"); break;
1308 case 4: puts ("SSTL 2.5 V\n"); break;
1309 case 5: puts ("SSTL 1.8 V\n"); break;
1310 default: puts ("unknown\n"); break;
1315 printf ("SDRAM cycle time ");
1316 print_ddr2_tcyc (data
[9]);
1319 printf ("SDRAM cycle time %d.%d ns\n",
1320 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
1326 printf ("SDRAM access time 0.%d%d ns\n",
1327 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1330 printf ("SDRAM access time %d.%d ns\n",
1331 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1335 puts ("EDC configuration ");
1337 case 0: puts ("None\n"); break;
1338 case 1: puts ("Parity\n"); break;
1339 case 2: puts ("ECC\n"); break;
1340 default: puts ("unknown\n"); break;
1343 if ((data
[12] & 0x80) == 0)
1344 puts ("No self refresh, rate ");
1346 puts ("Self refresh, rate ");
1348 switch(data
[12] & 0x7F) {
1349 case 0: puts ("15.625 us\n"); break;
1350 case 1: puts ("3.9 us\n"); break;
1351 case 2: puts ("7.8 us\n"); break;
1352 case 3: puts ("31.3 us\n"); break;
1353 case 4: puts ("62.5 us\n"); break;
1354 case 5: puts ("125 us\n"); break;
1355 default: puts ("unknown\n"); break;
1360 printf ("SDRAM width (primary) %d\n", data
[13]);
1363 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
1364 if ((data
[13] & 0x80) != 0) {
1365 printf (" (second bank) %d\n",
1366 2 * (data
[13] & 0x7F));
1374 printf ("EDC width %d\n", data
[14]);
1377 if (data
[14] != 0) {
1378 printf ("EDC width %d\n",
1381 if ((data
[14] & 0x80) != 0) {
1382 printf (" (second bank) %d\n",
1383 2 * (data
[14] & 0x7F));
1390 printf ("Min clock delay, back-to-back random column addresses "
1394 puts ("Burst length(s) ");
1395 if (data
[16] & 0x80) puts (" Page");
1396 if (data
[16] & 0x08) puts (" 8");
1397 if (data
[16] & 0x04) puts (" 4");
1398 if (data
[16] & 0x02) puts (" 2");
1399 if (data
[16] & 0x01) puts (" 1");
1401 printf ("Number of banks %d\n", data
[17]);
1405 puts ("CAS latency(s) ");
1406 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1410 puts ("CAS latency(s) ");
1411 decode_bits (data
[18], decode_CAS_default
, 0);
1417 puts ("CS latency(s) ");
1418 decode_bits (data
[19], decode_CS_WE_default
, 0);
1423 puts ("WE latency(s) ");
1424 decode_bits (data
[20], decode_CS_WE_default
, 0);
1430 puts ("Module attributes:\n");
1431 if (data
[21] & 0x80)
1432 puts (" TBD (bit 7)\n");
1433 if (data
[21] & 0x40)
1434 puts (" Analysis probe installed\n");
1435 if (data
[21] & 0x20)
1436 puts (" TBD (bit 5)\n");
1437 if (data
[21] & 0x10)
1438 puts (" FET switch external enable\n");
1439 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1440 if (data
[20] & 0x11) {
1441 printf (" %d active registers on DIMM\n",
1442 (data
[21] & 0x03) + 1);
1446 puts ("Module attributes:\n");
1450 decode_bits (data
[21], decode_byte21_default
, 0);
1456 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1459 puts ("Device attributes:\n");
1460 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1461 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1462 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1463 else puts (" Upper Vcc tolerance 10%\n");
1464 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1465 else puts (" Lower Vcc tolerance 10%\n");
1466 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1467 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1468 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1469 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1475 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1476 print_ddr2_tcyc (data
[23]);
1479 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1480 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1486 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1487 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1490 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1491 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1497 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1498 print_ddr2_tcyc (data
[25]);
1501 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1502 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1508 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1509 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1512 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1513 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1519 printf ("Minimum row precharge %d.%02d ns\n",
1520 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1523 printf ("Minimum row precharge %d ns\n", data
[27]);
1529 printf ("Row active to row active min %d.%02d ns\n",
1530 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1533 printf ("Row active to row active min %d ns\n", data
[28]);
1539 printf ("RAS to CAS delay min %d.%02d ns\n",
1540 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1543 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1547 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1551 puts ("Density of each row ");
1552 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1556 puts ("Density of each row ");
1557 decode_bits (data
[31], decode_row_density_default
, 1);
1564 puts ("Command and Address setup ");
1565 if (data
[32] >= 0xA0) {
1566 printf ("1.%d%d ns\n",
1567 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1569 printf ("0.%d%d ns\n",
1570 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1574 printf ("Command and Address setup %c%d.%d ns\n",
1575 (data
[32] & 0x80) ? '-' : '+',
1576 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1582 puts ("Command and Address hold ");
1583 if (data
[33] >= 0xA0) {
1584 printf ("1.%d%d ns\n",
1585 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1587 printf ("0.%d%d ns\n",
1588 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1592 printf ("Command and Address hold %c%d.%d ns\n",
1593 (data
[33] & 0x80) ? '-' : '+',
1594 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1600 printf ("Data signal input setup 0.%d%d ns\n",
1601 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1604 printf ("Data signal input setup %c%d.%d ns\n",
1605 (data
[34] & 0x80) ? '-' : '+',
1606 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1612 printf ("Data signal input hold 0.%d%d ns\n",
1613 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1616 printf ("Data signal input hold %c%d.%d ns\n",
1617 (data
[35] & 0x80) ? '-' : '+',
1618 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1622 puts ("Manufacturer's JEDEC ID ");
1623 for (j
= 64; j
<= 71; j
++)
1624 printf ("%02X ", data
[j
]);
1626 printf ("Manufacturing Location %02X\n", data
[72]);
1627 puts ("Manufacturer's Part Number ");
1628 for (j
= 73; j
<= 90; j
++)
1629 printf ("%02X ", data
[j
]);
1631 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1632 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1633 puts ("Assembly Serial Number ");
1634 for (j
= 95; j
<= 98; j
++)
1635 printf ("%02X ", data
[j
]);
1639 printf ("Speed rating PC%d\n",
1640 data
[126] == 0x66 ? 66 : data
[126]);
1648 * i2c edid {i2c_chip}
1650 #if defined(CONFIG_I2C_EDID)
1651 int do_edid(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
1654 struct edid1_info edid
;
1656 #ifdef CONFIG_DM_I2C
1657 struct udevice
*dev
;
1665 chip
= simple_strtoul(argv
[1], NULL
, 16);
1666 #ifdef CONFIG_DM_I2C
1667 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1669 ret
= dm_i2c_read(dev
, 0, (uchar
*)&edid
, sizeof(edid
));
1671 ret
= i2c_read(chip
, 0, 1, (uchar
*)&edid
, sizeof(edid
));
1674 return i2c_report_err(ret
, I2C_ERR_READ
);
1676 if (edid_check_info(&edid
)) {
1677 puts("Content isn't valid EDID.\n");
1681 edid_print_info(&edid
);
1685 #endif /* CONFIG_I2C_EDID */
1687 #ifdef CONFIG_DM_I2C
1688 static void show_bus(struct udevice
*bus
)
1690 struct udevice
*dev
;
1692 printf("Bus %d:\t%s", bus
->req_seq
, bus
->name
);
1693 if (device_active(bus
))
1694 printf(" (active %d)", bus
->seq
);
1696 for (device_find_first_child(bus
, &dev
);
1698 device_find_next_child(&dev
)) {
1699 struct dm_i2c_chip
*chip
= dev_get_parent_platdata(dev
);
1701 printf(" %02x: %s, offset len %x, flags %x\n",
1702 chip
->chip_addr
, dev
->name
, chip
->offset_len
,
1709 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1710 * @cmdtp: Command data struct pointer
1711 * @flag: Command flag
1712 * @argc: Command-line argument count
1713 * @argv: Array of command-line arguments
1715 * Returns zero always.
1717 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1718 static int do_i2c_show_bus(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1719 char * const argv
[])
1722 /* show all busses */
1723 #ifdef CONFIG_DM_I2C
1724 struct udevice
*bus
;
1728 ret
= uclass_get(UCLASS_I2C
, &uc
);
1730 return CMD_RET_FAILURE
;
1731 uclass_foreach_dev(bus
, uc
)
1736 for (i
= 0; i
< CONFIG_SYS_NUM_I2C_BUSES
; i
++) {
1737 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1738 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1741 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1742 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1744 printf("->%s@0x%2x:%d",
1745 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1746 i2c_bus
[i
].next_hop
[j
].chip
,
1747 i2c_bus
[i
].next_hop
[j
].channel
);
1756 /* show specific bus */
1757 i
= simple_strtoul(argv
[1], NULL
, 10);
1758 #ifdef CONFIG_DM_I2C
1759 struct udevice
*bus
;
1762 ret
= uclass_get_device_by_seq(UCLASS_I2C
, i
, &bus
);
1764 printf("Invalid bus %d: err=%d\n", i
, ret
);
1765 return CMD_RET_FAILURE
;
1769 if (i
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1770 printf("Invalid bus %d\n", i
);
1773 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1774 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1776 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1777 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1779 printf("->%s@0x%2x:%d",
1780 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1781 i2c_bus
[i
].next_hop
[j
].chip
,
1782 i2c_bus
[i
].next_hop
[j
].channel
);
1794 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1795 * @cmdtp: Command data struct pointer
1796 * @flag: Command flag
1797 * @argc: Command-line argument count
1798 * @argv: Array of command-line arguments
1800 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1803 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1804 defined(CONFIG_DM_I2C)
1805 static int do_i2c_bus_num(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1806 char * const argv
[])
1812 /* querying current setting */
1813 #ifdef CONFIG_DM_I2C
1814 struct udevice
*bus
;
1816 if (!i2c_get_cur_bus(&bus
))
1821 bus_no
= i2c_get_bus_num();
1823 printf("Current bus is %d\n", bus_no
);
1825 bus_no
= simple_strtoul(argv
[1], NULL
, 10);
1826 #if defined(CONFIG_SYS_I2C)
1827 if (bus_no
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1828 printf("Invalid bus %d\n", bus_no
);
1832 printf("Setting bus to %d\n", bus_no
);
1833 #ifdef CONFIG_DM_I2C
1834 ret
= cmd_i2c_set_bus_num(bus_no
);
1836 ret
= i2c_set_bus_num(bus_no
);
1839 printf("Failure changing bus number (%d)\n", ret
);
1842 return ret
? CMD_RET_FAILURE
: 0;
1844 #endif /* defined(CONFIG_SYS_I2C) */
1847 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1848 * @cmdtp: Command data struct pointer
1849 * @flag: Command flag
1850 * @argc: Command-line argument count
1851 * @argv: Array of command-line arguments
1853 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1856 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1860 #ifdef CONFIG_DM_I2C
1861 struct udevice
*bus
;
1863 if (i2c_get_cur_bus(&bus
))
1867 #ifdef CONFIG_DM_I2C
1868 speed
= dm_i2c_get_bus_speed(bus
);
1870 speed
= i2c_get_bus_speed();
1872 /* querying current speed */
1873 printf("Current bus speed=%d\n", speed
);
1875 speed
= simple_strtoul(argv
[1], NULL
, 10);
1876 printf("Setting bus speed to %d Hz\n", speed
);
1877 #ifdef CONFIG_DM_I2C
1878 ret
= dm_i2c_set_bus_speed(bus
, speed
);
1880 ret
= i2c_set_bus_speed(speed
);
1883 printf("Failure changing bus speed (%d)\n", ret
);
1886 return ret
? CMD_RET_FAILURE
: 0;
1890 * do_i2c_mm() - Handle the "i2c mm" command-line command
1891 * @cmdtp: Command data struct pointer
1892 * @flag: Command flag
1893 * @argc: Command-line argument count
1894 * @argv: Array of command-line arguments
1896 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1899 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1901 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1905 * do_i2c_nm() - Handle the "i2c nm" command-line command
1906 * @cmdtp: Command data struct pointer
1907 * @flag: Command flag
1908 * @argc: Command-line argument count
1909 * @argv: Array of command-line arguments
1911 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1914 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1916 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1920 * do_i2c_reset() - Handle the "i2c reset" command-line command
1921 * @cmdtp: Command data struct pointer
1922 * @flag: Command flag
1923 * @argc: Command-line argument count
1924 * @argv: Array of command-line arguments
1926 * Returns zero always.
1928 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1930 #if defined(CONFIG_DM_I2C)
1931 struct udevice
*bus
;
1933 if (i2c_get_cur_bus(&bus
))
1934 return CMD_RET_FAILURE
;
1935 if (i2c_deblock(bus
)) {
1936 printf("Error: Not supported by the driver\n");
1937 return CMD_RET_FAILURE
;
1939 #elif defined(CONFIG_SYS_I2C)
1940 i2c_init(I2C_ADAP
->speed
, I2C_ADAP
->slaveaddr
);
1942 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1947 static cmd_tbl_t cmd_i2c_sub
[] = {
1948 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1949 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_show_bus
, "", ""),
1951 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1952 #if defined(CONFIG_SYS_I2C) || \
1953 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1954 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1955 #endif /* CONFIG_I2C_MULTI_BUS */
1956 #if defined(CONFIG_I2C_EDID)
1957 U_BOOT_CMD_MKENT(edid
, 1, 1, do_edid
, "", ""),
1958 #endif /* CONFIG_I2C_EDID */
1959 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1960 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1961 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1962 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1963 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1964 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1965 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1966 U_BOOT_CMD_MKENT(write
, 6, 0, do_i2c_write
, "", ""),
1967 #ifdef CONFIG_DM_I2C
1968 U_BOOT_CMD_MKENT(flags
, 2, 1, do_i2c_flags
, "", ""),
1969 U_BOOT_CMD_MKENT(olen
, 2, 1, do_i2c_olen
, "", ""),
1971 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1972 #if defined(CONFIG_CMD_SDRAM)
1973 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1975 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1978 static __maybe_unused
void i2c_reloc(void)
1980 static int relocated
;
1983 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1989 * do_i2c() - Handle the "i2c" command-line command
1990 * @cmdtp: Command data struct pointer
1991 * @flag: Command flag
1992 * @argc: Command-line argument count
1993 * @argv: Array of command-line arguments
1995 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1998 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
2002 #ifdef CONFIG_NEEDS_MANUAL_RELOC
2007 return CMD_RET_USAGE
;
2009 /* Strip off leading 'i2c' command argument */
2013 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
2016 return c
->cmd(cmdtp
, flag
, argc
, argv
);
2018 return CMD_RET_USAGE
;
2021 /***************************************************/
2022 #ifdef CONFIG_SYS_LONGHELP
2023 static char i2c_help_text
[] =
2024 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
2025 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
2027 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
2028 #if defined(CONFIG_SYS_I2C) || \
2029 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
2030 "i2c dev [dev] - show or set current I2C bus\n"
2031 #endif /* CONFIG_I2C_MULTI_BUS */
2032 #if defined(CONFIG_I2C_EDID)
2033 "i2c edid chip - print EDID configuration information\n"
2034 #endif /* CONFIG_I2C_EDID */
2035 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2036 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2037 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2038 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2039 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2040 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2041 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2042 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2043 " to I2C; the -s option selects bulk write in a single transaction\n"
2044 #ifdef CONFIG_DM_I2C
2045 "i2c flags chip [flags] - set or get chip flags\n"
2046 "i2c olen chip [offset_length] - set or get chip offset length\n"
2048 "i2c reset - re-init the I2C Controller\n"
2049 #if defined(CONFIG_CMD_SDRAM)
2050 "i2c sdram chip - print SDRAM configuration information\n"
2052 "i2c speed [speed] - show or set I2C bus speed";