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
)
154 #ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
156 if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER
)) {
157 printf("Default I2C bus %d not found\n",
158 CONFIG_I2C_DEFAULT_BUS_NUMBER
);
165 puts("No I2C bus selected\n");
173 static int i2c_get_cur_bus_chip(uint chip_addr
, struct udevice
**devp
)
178 ret
= i2c_get_cur_bus(&bus
);
182 return i2c_get_chip(bus
, chip_addr
, 1, devp
);
188 * i2c_init_board() - Board-specific I2C bus init
190 * This function is the default no-op implementation of I2C bus
191 * initialization. This function can be overridden by board-specific
192 * implementation if needed.
195 void i2c_init_board(void)
199 /* TODO: Implement architecture-specific get/set functions */
202 * i2c_get_bus_speed() - Return I2C bus speed
204 * This function is the default implementation of function for retrieveing
205 * the current I2C bus speed in Hz.
207 * A driver implementing runtime switching of I2C bus speed must override
208 * this function to report the speed correctly. Simple or legacy drivers
209 * can use this fallback.
211 * Returns I2C bus speed in Hz.
213 #if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
215 * TODO: Implement architecture-specific get/set functions
216 * Should go away, if we switched completely to new multibus support
219 unsigned int i2c_get_bus_speed(void)
221 return CONFIG_SYS_I2C_SPEED
;
225 * i2c_set_bus_speed() - Configure I2C bus speed
226 * @speed: Newly set speed of the I2C bus in Hz
228 * This function is the default implementation of function for setting
229 * the I2C bus speed in Hz.
231 * A driver implementing runtime switching of I2C bus speed must override
232 * this function to report the speed correctly. Simple or legacy drivers
233 * can use this fallback.
235 * Returns zero on success, negative value on error.
238 int i2c_set_bus_speed(unsigned int speed
)
240 if (speed
!= CONFIG_SYS_I2C_SPEED
)
248 * get_alen() - Small parser helper function to get address length
250 * Returns the address length.
252 static uint
get_alen(char *arg
, int default_len
)
258 for (j
= 0; j
< 8; j
++) {
260 alen
= arg
[j
+1] - '0';
262 } else if (arg
[j
] == '\0')
273 static int i2c_report_err(int ret
, enum i2c_err_op op
)
275 printf("Error %s the chip: %d\n",
276 op
== I2C_ERR_READ
? "reading" : "writing", ret
);
278 return CMD_RET_FAILURE
;
282 * do_i2c_read() - Handle the "i2c read" command-line command
283 * @cmdtp: Command data struct pointer
284 * @flag: Command flag
285 * @argc: Command-line argument count
286 * @argv: Array of command-line arguments
288 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
292 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
294 static int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
297 uint devaddr
, length
;
306 return CMD_RET_USAGE
;
311 chip
= simple_strtoul(argv
[1], NULL
, 16);
314 * I2C data address within the chip. This can be 1 or
315 * 2 bytes long. Some day it might be 3 bytes long :-).
317 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
318 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
320 return CMD_RET_USAGE
;
323 * Length is the number of objects, not number of bytes.
325 length
= simple_strtoul(argv
[3], NULL
, 16);
328 * memaddr is the address where to store things in memory
330 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
333 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
334 if (!ret
&& alen
!= -1)
335 ret
= i2c_set_chip_offset_len(dev
, alen
);
337 ret
= dm_i2c_read(dev
, devaddr
, memaddr
, length
);
339 ret
= i2c_read(chip
, devaddr
, alen
, memaddr
, length
);
342 return i2c_report_err(ret
, I2C_ERR_READ
);
347 static int do_i2c_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
350 uint devaddr
, length
;
356 struct dm_i2c_chip
*i2c_chip
;
359 if ((argc
< 5) || (argc
> 6))
360 return cmd_usage(cmdtp
);
363 * memaddr is the address where to store things in memory
365 memaddr
= (u_char
*)simple_strtoul(argv
[1], NULL
, 16);
370 chip
= simple_strtoul(argv
[2], NULL
, 16);
373 * I2C data address within the chip. This can be 1 or
374 * 2 bytes long. Some day it might be 3 bytes long :-).
376 devaddr
= simple_strtoul(argv
[3], NULL
, 16);
377 alen
= get_alen(argv
[3], DEFAULT_ADDR_LEN
);
379 return cmd_usage(cmdtp
);
382 * Length is the number of bytes.
384 length
= simple_strtoul(argv
[4], NULL
, 16);
387 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
388 if (!ret
&& alen
!= -1)
389 ret
= i2c_set_chip_offset_len(dev
, alen
);
391 return i2c_report_err(ret
, I2C_ERR_WRITE
);
392 i2c_chip
= dev_get_parent_platdata(dev
);
394 return i2c_report_err(ret
, I2C_ERR_WRITE
);
397 if (argc
== 6 && !strcmp(argv
[5], "-s")) {
399 * Write all bytes in a single I2C transaction. If the target
400 * device is an EEPROM, it is your responsibility to not cross
401 * a page boundary. No write delay upon completion, take this
402 * into account if linking commands.
405 i2c_chip
->flags
&= ~DM_I2C_CHIP_WR_ADDRESS
;
406 ret
= dm_i2c_write(dev
, devaddr
, memaddr
, length
);
408 ret
= i2c_write(chip
, devaddr
, alen
, memaddr
, length
);
411 return i2c_report_err(ret
, I2C_ERR_WRITE
);
414 * Repeated addressing - perform <length> separate
415 * write transactions of one byte each
417 while (length
-- > 0) {
419 i2c_chip
->flags
|= DM_I2C_CHIP_WR_ADDRESS
;
420 ret
= dm_i2c_write(dev
, devaddr
++, memaddr
++, 1);
422 ret
= i2c_write(chip
, devaddr
++, alen
, memaddr
++, 1);
425 return i2c_report_err(ret
, I2C_ERR_WRITE
);
427 * No write delay with FRAM devices.
429 #if !defined(CONFIG_SYS_I2C_FRAM)
438 static int do_i2c_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
447 return CMD_RET_USAGE
;
449 chip
= simple_strtoul(argv
[1], NULL
, 16);
450 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
452 return i2c_report_err(ret
, I2C_ERR_READ
);
455 flags
= simple_strtoul(argv
[2], NULL
, 16);
456 ret
= i2c_set_chip_flags(dev
, flags
);
458 ret
= i2c_get_chip_flags(dev
, &flags
);
460 printf("%x\n", flags
);
463 return i2c_report_err(ret
, I2C_ERR_READ
);
468 static int do_i2c_olen(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
476 return CMD_RET_USAGE
;
478 chip
= simple_strtoul(argv
[1], NULL
, 16);
479 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
481 return i2c_report_err(ret
, I2C_ERR_READ
);
484 olen
= simple_strtoul(argv
[2], NULL
, 16);
485 ret
= i2c_set_chip_offset_len(dev
, olen
);
487 ret
= i2c_get_chip_offset_len(dev
);
494 return i2c_report_err(ret
, I2C_ERR_READ
);
501 * do_i2c_md() - Handle the "i2c md" command-line command
502 * @cmdtp: Command data struct pointer
503 * @flag: Command flag
504 * @argc: Command-line argument count
505 * @argv: Array of command-line arguments
507 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
511 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
513 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
518 int j
, nbytes
, linebytes
;
524 /* We use the last specified parameters, unless new ones are
527 chip
= i2c_dp_last_chip
;
528 addr
= i2c_dp_last_addr
;
529 alen
= i2c_dp_last_alen
;
530 length
= i2c_dp_last_length
;
533 return CMD_RET_USAGE
;
535 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
537 * New command specified.
543 chip
= simple_strtoul(argv
[1], NULL
, 16);
546 * I2C data address within the chip. This can be 1 or
547 * 2 bytes long. Some day it might be 3 bytes long :-).
549 addr
= simple_strtoul(argv
[2], NULL
, 16);
550 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
552 return CMD_RET_USAGE
;
555 * If another parameter, it is the length to display.
556 * Length is the number of objects, not number of bytes.
559 length
= simple_strtoul(argv
[3], NULL
, 16);
563 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
564 if (!ret
&& alen
!= -1)
565 ret
= i2c_set_chip_offset_len(dev
, alen
);
567 return i2c_report_err(ret
, I2C_ERR_READ
);
573 * We buffer all read data, so we can make sure data is read only
578 unsigned char linebuf
[DISP_LINE_LEN
];
581 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
584 ret
= dm_i2c_read(dev
, addr
, linebuf
, linebytes
);
586 ret
= i2c_read(chip
, addr
, alen
, linebuf
, linebytes
);
589 return i2c_report_err(ret
, I2C_ERR_READ
);
591 printf("%04x:", addr
);
593 for (j
=0; j
<linebytes
; j
++) {
594 printf(" %02x", *cp
++);
599 for (j
=0; j
<linebytes
; j
++) {
600 if ((*cp
< 0x20) || (*cp
> 0x7e))
609 } while (nbytes
> 0);
611 i2c_dp_last_chip
= chip
;
612 i2c_dp_last_addr
= addr
;
613 i2c_dp_last_alen
= alen
;
614 i2c_dp_last_length
= length
;
620 * do_i2c_mw() - Handle the "i2c mw" command-line command
621 * @cmdtp: Command data struct pointer
622 * @flag: Command flag
623 * @argc: Command-line argument count
624 * @argv: Array of command-line arguments
626 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
630 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
632 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
644 if ((argc
< 4) || (argc
> 5))
645 return CMD_RET_USAGE
;
648 * Chip is always specified.
650 chip
= simple_strtoul(argv
[1], NULL
, 16);
653 * Address is always specified.
655 addr
= simple_strtoul(argv
[2], NULL
, 16);
656 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
658 return CMD_RET_USAGE
;
661 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
662 if (!ret
&& alen
!= -1)
663 ret
= i2c_set_chip_offset_len(dev
, alen
);
665 return i2c_report_err(ret
, I2C_ERR_WRITE
);
668 * Value to write is always specified.
670 byte
= simple_strtoul(argv
[3], NULL
, 16);
676 count
= simple_strtoul(argv
[4], NULL
, 16);
680 while (count
-- > 0) {
682 ret
= dm_i2c_write(dev
, addr
++, &byte
, 1);
684 ret
= i2c_write(chip
, addr
++, alen
, &byte
, 1);
687 return i2c_report_err(ret
, I2C_ERR_WRITE
);
689 * Wait for the write to complete. The write can take
690 * up to 10mSec (we allow a little more time).
693 * No write delay with FRAM devices.
695 #if !defined(CONFIG_SYS_I2C_FRAM)
704 * do_i2c_crc() - Handle the "i2c crc32" command-line command
705 * @cmdtp: Command data struct pointer
706 * @flag: Command flag
707 * @argc: Command-line argument count
708 * @argv: Array of command-line arguments
710 * Calculate a CRC on memory
712 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
716 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
718 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
733 return CMD_RET_USAGE
;
736 * Chip is always specified.
738 chip
= simple_strtoul(argv
[1], NULL
, 16);
741 * Address is always specified.
743 addr
= simple_strtoul(argv
[2], NULL
, 16);
744 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
746 return CMD_RET_USAGE
;
749 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
750 if (!ret
&& alen
!= -1)
751 ret
= i2c_set_chip_offset_len(dev
, alen
);
753 return i2c_report_err(ret
, I2C_ERR_READ
);
756 * Count is always specified
758 count
= simple_strtoul(argv
[3], NULL
, 16);
760 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
762 * CRC a byte at a time. This is going to be slooow, but hey, the
763 * memories are small and slow too so hopefully nobody notices.
767 while (count
-- > 0) {
769 ret
= dm_i2c_read(dev
, addr
, &byte
, 1);
771 ret
= i2c_read(chip
, addr
, alen
, &byte
, 1);
775 crc
= crc32 (crc
, &byte
, 1);
779 i2c_report_err(ret
, I2C_ERR_READ
);
781 printf ("%08lx\n", crc
);
787 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
788 * @cmdtp: Command data struct pointer
789 * @flag: Command flag
790 * @argc: Command-line argument count
791 * @argv: Array of command-line arguments
795 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
799 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
800 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
803 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
817 return CMD_RET_USAGE
;
819 bootretry_reset_cmd_timeout(); /* got a good command to get here */
821 * We use the last specified parameters, unless new ones are
824 chip
= i2c_mm_last_chip
;
825 addr
= i2c_mm_last_addr
;
826 alen
= i2c_mm_last_alen
;
828 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
830 * New command specified. Check for a size specification.
831 * Defaults to byte if no or incorrect specification.
833 size
= cmd_get_data_size(argv
[0], 1);
836 * Chip is always specified.
838 chip
= simple_strtoul(argv
[1], NULL
, 16);
841 * Address is always specified.
843 addr
= simple_strtoul(argv
[2], NULL
, 16);
844 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
846 return CMD_RET_USAGE
;
850 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
851 if (!ret
&& alen
!= -1)
852 ret
= i2c_set_chip_offset_len(dev
, alen
);
854 return i2c_report_err(ret
, I2C_ERR_WRITE
);
858 * Print the address, followed by value. Then accept input for
859 * the next value. A non-converted value exits.
862 printf("%08lx:", addr
);
864 ret
= dm_i2c_read(dev
, addr
, (uchar
*)&data
, size
);
866 ret
= i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
);
869 return i2c_report_err(ret
, I2C_ERR_READ
);
871 data
= cpu_to_be32(data
);
873 printf(" %02lx", (data
>> 24) & 0x000000FF);
875 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
877 printf(" %08lx", data
);
879 nbytes
= cli_readline(" ? ");
882 * <CR> pressed as only input, don't modify current
883 * location and move to next.
888 /* good enough to not time out */
889 bootretry_reset_cmd_timeout();
891 #ifdef CONFIG_BOOT_RETRY_TIME
892 else if (nbytes
== -2)
893 break; /* timed out, exit the command */
898 data
= simple_strtoul(console_buffer
, &endp
, 16);
903 data
= be32_to_cpu(data
);
904 nbytes
= endp
- console_buffer
;
907 * good enough to not time out
909 bootretry_reset_cmd_timeout();
911 ret
= dm_i2c_write(dev
, addr
, (uchar
*)&data
,
914 ret
= i2c_write(chip
, addr
, alen
,
915 (uchar
*)&data
, size
);
918 return i2c_report_err(ret
,
920 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
921 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
929 i2c_mm_last_chip
= chip
;
930 i2c_mm_last_addr
= addr
;
931 i2c_mm_last_alen
= alen
;
937 * do_i2c_probe() - Handle the "i2c probe" command-line command
938 * @cmdtp: Command data struct pointer
939 * @flag: Command flag
940 * @argc: Command-line argument count
941 * @argv: Array of command-line arguments
943 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
949 * Returns zero (success) if one or more I2C devices was found
951 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
956 #if defined(CONFIG_SYS_I2C_NOPROBES)
958 unsigned int bus
= GET_BUS_NUM
;
959 #endif /* NOPROBES */
962 struct udevice
*bus
, *dev
;
964 if (i2c_get_cur_bus(&bus
))
965 return CMD_RET_FAILURE
;
969 addr
= simple_strtol(argv
[1], 0, 16);
971 puts ("Valid chip addresses:");
972 for (j
= 0; j
< 128; j
++) {
973 if ((0 <= addr
) && (j
!= addr
))
976 #if defined(CONFIG_SYS_I2C_NOPROBES)
978 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
979 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
988 ret
= dm_i2c_probe(bus
, j
, 0, &dev
);
999 #if defined(CONFIG_SYS_I2C_NOPROBES)
1000 puts ("Excluded chip addresses:");
1001 for (k
= 0; k
< ARRAY_SIZE(i2c_no_probes
); k
++) {
1002 if (COMPARE_BUS(bus
,k
))
1003 printf(" %02X", NO_PROBE_ADDR(k
));
1008 return (0 == found
);
1012 * do_i2c_loop() - Handle the "i2c loop" command-line command
1013 * @cmdtp: Command data struct pointer
1014 * @flag: Command flag
1015 * @argc: Command-line argument count
1016 * @argv: Array of command-line arguments
1018 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1022 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
1023 * {length} - Number of bytes to read
1024 * {delay} - A DECIMAL number and defaults to 1000 uSec
1026 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1035 #ifdef CONFIG_DM_I2C
1036 struct udevice
*dev
;
1040 return CMD_RET_USAGE
;
1043 * Chip is always specified.
1045 chip
= simple_strtoul(argv
[1], NULL
, 16);
1048 * Address is always specified.
1050 addr
= simple_strtoul(argv
[2], NULL
, 16);
1051 alen
= get_alen(argv
[2], DEFAULT_ADDR_LEN
);
1053 return CMD_RET_USAGE
;
1054 #ifdef CONFIG_DM_I2C
1055 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1056 if (!ret
&& alen
!= -1)
1057 ret
= i2c_set_chip_offset_len(dev
, alen
);
1059 return i2c_report_err(ret
, I2C_ERR_WRITE
);
1063 * Length is the number of objects, not number of bytes.
1066 length
= simple_strtoul(argv
[3], NULL
, 16);
1067 if (length
> sizeof(bytes
))
1068 length
= sizeof(bytes
);
1071 * The delay time (uSec) is optional.
1075 delay
= simple_strtoul(argv
[4], NULL
, 10);
1080 #ifdef CONFIG_DM_I2C
1081 ret
= dm_i2c_read(dev
, addr
, bytes
, length
);
1083 ret
= i2c_read(chip
, addr
, alen
, bytes
, length
);
1086 i2c_report_err(ret
, I2C_ERR_READ
);
1095 * The SDRAM command is separately configured because many
1096 * (most?) embedded boards don't use SDRAM DIMMs.
1098 * FIXME: Document and probably move elsewhere!
1100 #if defined(CONFIG_CMD_SDRAM)
1101 static void print_ddr2_tcyc (u_char
const b
)
1103 printf ("%d.", (b
>> 4) & 0x0F);
1115 printf ("%d ns\n", b
& 0x0F);
1135 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
1139 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
1150 * i2c sdram {i2c_chip}
1152 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1154 enum { unknown
, EDO
, SDRAM
, DDR
, DDR2
, DDR3
, DDR4
} type
;
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 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
1214 puts ("No SDRAM Serial Presence Detect found.\n");
1219 for (j
= 0; j
< 63; j
++) {
1222 if (cksum
!= data
[63]) {
1223 printf ("WARNING: Configuration data checksum failure:\n"
1224 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
1226 printf ("SPD data revision %d.%d\n",
1227 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
1228 printf ("Bytes used 0x%02X\n", data
[0]);
1229 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
1231 puts ("Memory type ");
1263 puts ("Row address bits ");
1264 if ((data
[3] & 0x00F0) == 0)
1265 printf ("%d\n", data
[3] & 0x0F);
1267 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
1269 puts ("Column address bits ");
1270 if ((data
[4] & 0x00F0) == 0)
1271 printf ("%d\n", data
[4] & 0x0F);
1273 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
1277 printf ("Number of ranks %d\n",
1278 (data
[5] & 0x07) + 1);
1281 printf ("Module rows %d\n", data
[5]);
1287 printf ("Module data width %d bits\n", data
[6]);
1290 printf ("Module data width %d bits\n",
1291 (data
[7] << 8) | data
[6]);
1295 puts ("Interface signal levels ");
1297 case 0: puts ("TTL 5.0 V\n"); break;
1298 case 1: puts ("LVTTL\n"); break;
1299 case 2: puts ("HSTL 1.5 V\n"); break;
1300 case 3: puts ("SSTL 3.3 V\n"); break;
1301 case 4: puts ("SSTL 2.5 V\n"); break;
1302 case 5: puts ("SSTL 1.8 V\n"); break;
1303 default: puts ("unknown\n"); break;
1308 printf ("SDRAM cycle time ");
1309 print_ddr2_tcyc (data
[9]);
1312 printf ("SDRAM cycle time %d.%d ns\n",
1313 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
1319 printf ("SDRAM access time 0.%d%d ns\n",
1320 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1323 printf ("SDRAM access time %d.%d ns\n",
1324 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
1328 puts ("EDC configuration ");
1330 case 0: puts ("None\n"); break;
1331 case 1: puts ("Parity\n"); break;
1332 case 2: puts ("ECC\n"); break;
1333 default: puts ("unknown\n"); break;
1336 if ((data
[12] & 0x80) == 0)
1337 puts ("No self refresh, rate ");
1339 puts ("Self refresh, rate ");
1341 switch(data
[12] & 0x7F) {
1342 case 0: puts ("15.625 us\n"); break;
1343 case 1: puts ("3.9 us\n"); break;
1344 case 2: puts ("7.8 us\n"); break;
1345 case 3: puts ("31.3 us\n"); break;
1346 case 4: puts ("62.5 us\n"); break;
1347 case 5: puts ("125 us\n"); break;
1348 default: puts ("unknown\n"); break;
1353 printf ("SDRAM width (primary) %d\n", data
[13]);
1356 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
1357 if ((data
[13] & 0x80) != 0) {
1358 printf (" (second bank) %d\n",
1359 2 * (data
[13] & 0x7F));
1367 printf ("EDC width %d\n", data
[14]);
1370 if (data
[14] != 0) {
1371 printf ("EDC width %d\n",
1374 if ((data
[14] & 0x80) != 0) {
1375 printf (" (second bank) %d\n",
1376 2 * (data
[14] & 0x7F));
1383 printf ("Min clock delay, back-to-back random column addresses "
1387 puts ("Burst length(s) ");
1388 if (data
[16] & 0x80) puts (" Page");
1389 if (data
[16] & 0x08) puts (" 8");
1390 if (data
[16] & 0x04) puts (" 4");
1391 if (data
[16] & 0x02) puts (" 2");
1392 if (data
[16] & 0x01) puts (" 1");
1394 printf ("Number of banks %d\n", data
[17]);
1398 puts ("CAS latency(s) ");
1399 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1403 puts ("CAS latency(s) ");
1404 decode_bits (data
[18], decode_CAS_default
, 0);
1410 puts ("CS latency(s) ");
1411 decode_bits (data
[19], decode_CS_WE_default
, 0);
1416 puts ("WE latency(s) ");
1417 decode_bits (data
[20], decode_CS_WE_default
, 0);
1423 puts ("Module attributes:\n");
1424 if (data
[21] & 0x80)
1425 puts (" TBD (bit 7)\n");
1426 if (data
[21] & 0x40)
1427 puts (" Analysis probe installed\n");
1428 if (data
[21] & 0x20)
1429 puts (" TBD (bit 5)\n");
1430 if (data
[21] & 0x10)
1431 puts (" FET switch external enable\n");
1432 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1433 if (data
[20] & 0x11) {
1434 printf (" %d active registers on DIMM\n",
1435 (data
[21] & 0x03) + 1);
1439 puts ("Module attributes:\n");
1443 decode_bits (data
[21], decode_byte21_default
, 0);
1449 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1452 puts ("Device attributes:\n");
1453 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1454 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1455 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1456 else puts (" Upper Vcc tolerance 10%\n");
1457 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1458 else puts (" Lower Vcc tolerance 10%\n");
1459 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1460 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1461 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1462 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1468 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1469 print_ddr2_tcyc (data
[23]);
1472 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1473 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1479 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1480 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1483 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1484 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1490 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1491 print_ddr2_tcyc (data
[25]);
1494 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1495 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1501 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1502 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1505 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1506 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1512 printf ("Minimum row precharge %d.%02d ns\n",
1513 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1516 printf ("Minimum row precharge %d ns\n", data
[27]);
1522 printf ("Row active to row active min %d.%02d ns\n",
1523 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1526 printf ("Row active to row active min %d ns\n", data
[28]);
1532 printf ("RAS to CAS delay min %d.%02d ns\n",
1533 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1536 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1540 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1544 puts ("Density of each row ");
1545 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1549 puts ("Density of each row ");
1550 decode_bits (data
[31], decode_row_density_default
, 1);
1557 puts ("Command and Address setup ");
1558 if (data
[32] >= 0xA0) {
1559 printf ("1.%d%d ns\n",
1560 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1562 printf ("0.%d%d ns\n",
1563 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1567 printf ("Command and Address setup %c%d.%d ns\n",
1568 (data
[32] & 0x80) ? '-' : '+',
1569 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1575 puts ("Command and Address hold ");
1576 if (data
[33] >= 0xA0) {
1577 printf ("1.%d%d ns\n",
1578 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1580 printf ("0.%d%d ns\n",
1581 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1585 printf ("Command and Address hold %c%d.%d ns\n",
1586 (data
[33] & 0x80) ? '-' : '+',
1587 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1593 printf ("Data signal input setup 0.%d%d ns\n",
1594 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1597 printf ("Data signal input setup %c%d.%d ns\n",
1598 (data
[34] & 0x80) ? '-' : '+',
1599 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1605 printf ("Data signal input hold 0.%d%d ns\n",
1606 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1609 printf ("Data signal input hold %c%d.%d ns\n",
1610 (data
[35] & 0x80) ? '-' : '+',
1611 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1615 puts ("Manufacturer's JEDEC ID ");
1616 for (j
= 64; j
<= 71; j
++)
1617 printf ("%02X ", data
[j
]);
1619 printf ("Manufacturing Location %02X\n", data
[72]);
1620 puts ("Manufacturer's Part Number ");
1621 for (j
= 73; j
<= 90; j
++)
1622 printf ("%02X ", data
[j
]);
1624 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1625 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1626 puts ("Assembly Serial Number ");
1627 for (j
= 95; j
<= 98; j
++)
1628 printf ("%02X ", data
[j
]);
1632 printf ("Speed rating PC%d\n",
1633 data
[126] == 0x66 ? 66 : data
[126]);
1641 * i2c edid {i2c_chip}
1643 #if defined(CONFIG_I2C_EDID)
1644 int do_edid(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
1647 struct edid1_info edid
;
1649 #ifdef CONFIG_DM_I2C
1650 struct udevice
*dev
;
1658 chip
= simple_strtoul(argv
[1], NULL
, 16);
1659 #ifdef CONFIG_DM_I2C
1660 ret
= i2c_get_cur_bus_chip(chip
, &dev
);
1662 ret
= dm_i2c_read(dev
, 0, (uchar
*)&edid
, sizeof(edid
));
1664 ret
= i2c_read(chip
, 0, 1, (uchar
*)&edid
, sizeof(edid
));
1667 return i2c_report_err(ret
, I2C_ERR_READ
);
1669 if (edid_check_info(&edid
)) {
1670 puts("Content isn't valid EDID.\n");
1674 edid_print_info(&edid
);
1678 #endif /* CONFIG_I2C_EDID */
1680 #ifdef CONFIG_DM_I2C
1681 static void show_bus(struct udevice
*bus
)
1683 struct udevice
*dev
;
1685 printf("Bus %d:\t%s", bus
->req_seq
, bus
->name
);
1686 if (device_active(bus
))
1687 printf(" (active %d)", bus
->seq
);
1689 for (device_find_first_child(bus
, &dev
);
1691 device_find_next_child(&dev
)) {
1692 struct dm_i2c_chip
*chip
= dev_get_parent_platdata(dev
);
1694 printf(" %02x: %s, offset len %x, flags %x\n",
1695 chip
->chip_addr
, dev
->name
, chip
->offset_len
,
1702 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1703 * @cmdtp: Command data struct pointer
1704 * @flag: Command flag
1705 * @argc: Command-line argument count
1706 * @argv: Array of command-line arguments
1708 * Returns zero always.
1710 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1711 static int do_i2c_show_bus(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1712 char * const argv
[])
1715 /* show all busses */
1716 #ifdef CONFIG_DM_I2C
1717 struct udevice
*bus
;
1721 ret
= uclass_get(UCLASS_I2C
, &uc
);
1723 return CMD_RET_FAILURE
;
1724 uclass_foreach_dev(bus
, uc
)
1729 for (i
= 0; i
< CONFIG_SYS_NUM_I2C_BUSES
; i
++) {
1730 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1731 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1734 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1735 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1737 printf("->%s@0x%2x:%d",
1738 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1739 i2c_bus
[i
].next_hop
[j
].chip
,
1740 i2c_bus
[i
].next_hop
[j
].channel
);
1749 /* show specific bus */
1750 i
= simple_strtoul(argv
[1], NULL
, 10);
1751 #ifdef CONFIG_DM_I2C
1752 struct udevice
*bus
;
1755 ret
= uclass_get_device_by_seq(UCLASS_I2C
, i
, &bus
);
1757 printf("Invalid bus %d: err=%d\n", i
, ret
);
1758 return CMD_RET_FAILURE
;
1762 if (i
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1763 printf("Invalid bus %d\n", i
);
1766 printf("Bus %d:\t%s", i
, I2C_ADAP_NR(i
)->name
);
1767 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1769 for (j
= 0; j
< CONFIG_SYS_I2C_MAX_HOPS
; j
++) {
1770 if (i2c_bus
[i
].next_hop
[j
].chip
== 0)
1772 printf("->%s@0x%2x:%d",
1773 i2c_bus
[i
].next_hop
[j
].mux
.name
,
1774 i2c_bus
[i
].next_hop
[j
].chip
,
1775 i2c_bus
[i
].next_hop
[j
].channel
);
1787 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1788 * @cmdtp: Command data struct pointer
1789 * @flag: Command flag
1790 * @argc: Command-line argument count
1791 * @argv: Array of command-line arguments
1793 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1796 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
1797 defined(CONFIG_DM_I2C)
1798 static int do_i2c_bus_num(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1799 char * const argv
[])
1805 /* querying current setting */
1806 #ifdef CONFIG_DM_I2C
1807 struct udevice
*bus
;
1809 if (!i2c_get_cur_bus(&bus
))
1814 bus_no
= i2c_get_bus_num();
1816 printf("Current bus is %d\n", bus_no
);
1818 bus_no
= simple_strtoul(argv
[1], NULL
, 10);
1819 #if defined(CONFIG_SYS_I2C)
1820 if (bus_no
>= CONFIG_SYS_NUM_I2C_BUSES
) {
1821 printf("Invalid bus %d\n", bus_no
);
1825 printf("Setting bus to %d\n", bus_no
);
1826 #ifdef CONFIG_DM_I2C
1827 ret
= cmd_i2c_set_bus_num(bus_no
);
1829 ret
= i2c_set_bus_num(bus_no
);
1832 printf("Failure changing bus number (%d)\n", ret
);
1835 return ret
? CMD_RET_FAILURE
: 0;
1837 #endif /* defined(CONFIG_SYS_I2C) */
1840 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1841 * @cmdtp: Command data struct pointer
1842 * @flag: Command flag
1843 * @argc: Command-line argument count
1844 * @argv: Array of command-line arguments
1846 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1849 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1853 #ifdef CONFIG_DM_I2C
1854 struct udevice
*bus
;
1856 if (i2c_get_cur_bus(&bus
))
1860 #ifdef CONFIG_DM_I2C
1861 speed
= dm_i2c_get_bus_speed(bus
);
1863 speed
= i2c_get_bus_speed();
1865 /* querying current speed */
1866 printf("Current bus speed=%d\n", speed
);
1868 speed
= simple_strtoul(argv
[1], NULL
, 10);
1869 printf("Setting bus speed to %d Hz\n", speed
);
1870 #ifdef CONFIG_DM_I2C
1871 ret
= dm_i2c_set_bus_speed(bus
, speed
);
1873 ret
= i2c_set_bus_speed(speed
);
1876 printf("Failure changing bus speed (%d)\n", ret
);
1879 return ret
? CMD_RET_FAILURE
: 0;
1883 * do_i2c_mm() - Handle the "i2c mm" command-line command
1884 * @cmdtp: Command data struct pointer
1885 * @flag: Command flag
1886 * @argc: Command-line argument count
1887 * @argv: Array of command-line arguments
1889 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1892 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1894 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1898 * do_i2c_nm() - Handle the "i2c nm" command-line command
1899 * @cmdtp: Command data struct pointer
1900 * @flag: Command flag
1901 * @argc: Command-line argument count
1902 * @argv: Array of command-line arguments
1904 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1907 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1909 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1913 * do_i2c_reset() - Handle the "i2c reset" command-line command
1914 * @cmdtp: Command data struct pointer
1915 * @flag: Command flag
1916 * @argc: Command-line argument count
1917 * @argv: Array of command-line arguments
1919 * Returns zero always.
1921 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1923 #if defined(CONFIG_DM_I2C)
1924 struct udevice
*bus
;
1926 if (i2c_get_cur_bus(&bus
))
1927 return CMD_RET_FAILURE
;
1928 if (i2c_deblock(bus
)) {
1929 printf("Error: Not supported by the driver\n");
1930 return CMD_RET_FAILURE
;
1932 #elif defined(CONFIG_SYS_I2C)
1933 i2c_init(I2C_ADAP
->speed
, I2C_ADAP
->slaveaddr
);
1935 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1940 static cmd_tbl_t cmd_i2c_sub
[] = {
1941 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
1942 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_show_bus
, "", ""),
1944 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1945 #if defined(CONFIG_SYS_I2C) || \
1946 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
1947 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1948 #endif /* CONFIG_I2C_MULTI_BUS */
1949 #if defined(CONFIG_I2C_EDID)
1950 U_BOOT_CMD_MKENT(edid
, 1, 1, do_edid
, "", ""),
1951 #endif /* CONFIG_I2C_EDID */
1952 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1953 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1954 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1955 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1956 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1957 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1958 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1959 U_BOOT_CMD_MKENT(write
, 6, 0, do_i2c_write
, "", ""),
1960 #ifdef CONFIG_DM_I2C
1961 U_BOOT_CMD_MKENT(flags
, 2, 1, do_i2c_flags
, "", ""),
1962 U_BOOT_CMD_MKENT(olen
, 2, 1, do_i2c_olen
, "", ""),
1964 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1965 #if defined(CONFIG_CMD_SDRAM)
1966 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1968 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1971 static __maybe_unused
void i2c_reloc(void)
1973 static int relocated
;
1976 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1982 * do_i2c() - Handle the "i2c" command-line command
1983 * @cmdtp: Command data struct pointer
1984 * @flag: Command flag
1985 * @argc: Command-line argument count
1986 * @argv: Array of command-line arguments
1988 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1991 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1995 #ifdef CONFIG_NEEDS_MANUAL_RELOC
2000 return CMD_RET_USAGE
;
2002 /* Strip off leading 'i2c' command argument */
2006 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
2009 return c
->cmd(cmdtp
, flag
, argc
, argv
);
2011 return CMD_RET_USAGE
;
2014 /***************************************************/
2015 #ifdef CONFIG_SYS_LONGHELP
2016 static char i2c_help_text
[] =
2017 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
2018 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
2020 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
2021 #if defined(CONFIG_SYS_I2C) || \
2022 defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
2023 "i2c dev [dev] - show or set current I2C bus\n"
2024 #endif /* CONFIG_I2C_MULTI_BUS */
2025 #if defined(CONFIG_I2C_EDID)
2026 "i2c edid chip - print EDID configuration information\n"
2027 #endif /* CONFIG_I2C_EDID */
2028 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
2029 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
2030 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
2031 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
2032 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
2033 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
2034 "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
2035 "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
2036 " to I2C; the -s option selects bulk write in a single transaction\n"
2037 #ifdef CONFIG_DM_I2C
2038 "i2c flags chip [flags] - set or get chip flags\n"
2039 "i2c olen chip [offset_length] - set or get chip offset length\n"
2041 "i2c reset - re-init the I2C Controller\n"
2042 #if defined(CONFIG_CMD_SDRAM)
2043 "i2c sdram chip - print SDRAM configuration information\n"
2045 "i2c speed [speed] - show or set I2C bus speed";